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Full vulnerability report · 2025
CVE-2025-26465High confidence

Openssh: machine-in-the-middle attack if verifyhostkeydns is enabled

Unknown · Unknown

Official source article: Red Hat RHSA-2025:16823 ↗. Check the applicable product and release in the original source.

6.8MediumCVSS 3.1
Recommended action
Patch only the product branches with a verified fix

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 8 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:High, raised one band.upgradedsince 2 Sep 2026

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • A structured source references public exploit or proof-of-concept material.
  • EPSS is 7.72% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Unknown Unknown and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 30 daysRemediation target: Within 180 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Cross-source reconciliation

Remediation availability differs by product scope

Verified remediation exists for at least one product or source, but 8 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Distribution package intelligence

Release-specific package status

Alpine, Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

9 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Alpine v3.23v3.23 · mainopensshVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.9.9_p2-r0Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.22v3.22 · mainopensshVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.9.9_p2-r0Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.21v3.21 · mainopensshVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.9.9_p2-r0Alpine Security Database ↗Source updated 3 Oct 2026
Debian trixietrixie · sourceopensshVendor fix publishedDebian records a fixed source-package version for this release.1:9.9p2-1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian bookwormbookworm · sourceopensshVendor fix publishedDebian records a fixed source-package version for this release.1:9.2p1-2+deb12u5Debian Security Tracker ↗Source updated 6 Oct 2026
Debian forkyforky · sourceopensshVendor fix publishedDebian records a fixed source-package version for this release.1:9.9p2-1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian sidsid · sourceopensshVendor fix publishedDebian records a fixed source-package version for this release.1:9.9p2-1Debian Security Tracker ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archiveopensshVendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.1:9.6p1-3ubuntu13.8Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archiveopenssh-ssh1Under evaluationCanonical reports that the package might be affected and still needs evaluation or fixing.Not published in this feedCanonical Ubuntu Security ↗Source updated 5 Oct 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

5 current
CVE-2025-26465 · CSAF 2.0 · revision 3 · finalRed Hat Product Securityopenssh: Machine-in-the-middle attack if VerifyHostKeyDNS is enabled
18 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • openssh as a component of Red Hat Enterprise Linux 6
  • openssh-askpass as a component of Red Hat Enterprise Linux 6
  • openssh-clients as a component of Red Hat Enterprise Linux 6
  • openssh-ldap as a component of Red Hat Enterprise Linux 6
  • openssh-server as a component of Red Hat Enterprise Linux 6
  • openssh.src as a component of Red Hat Enterprise Linux 6
  • pam_ssh_agent_auth as a component of Red Hat Enterprise Linux 6
  • openssh as a component of Red Hat Enterprise Linux 7
  • openssh-askpass as a component of Red Hat Enterprise Linux 7
  • openssh-cavs as a component of Red Hat Enterprise Linux 7
  • openssh-clients as a component of Red Hat Enterprise Linux 7
  • openssh-keycat as a component of Red Hat Enterprise Linux 7
Summary
A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.
Remediation
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
SSA-082556 · CSAF 2.0 · revision 7 · interimSiemens ProductCERTSSA-082556: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1.5
5 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= V3.1.5
  • SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= V3.1.5
  • SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= V3.1.5
  • SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= V3.1.5
  • SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= V3.1.5
Summary
A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.
Remediation
Limit access to the interactive shell of the additional GNU/Linux subssytem to trusted personnel only.
SSA-585531 · CSAF 2.0 · revision 1 · interimSiemens ProductCERTSSA-585531: Multiple Vulnerabilities in SIDIS Secured SmartPlug before V7.26.0310
1 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • SIDIS Secured SmartPlug < V7.26.0310
Summary
A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.
Remediation
Update to V7.26.0310 or later version
SCA-2025-0011 · CSAF 2.0 · revision 1.0.0 · finalSICK PSIRTVulnerabilities affecting Endress+Hauser SSG-E210GC
1 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • Endress+Hauser SSG-E210GC all Firmware versions
Summary
A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.
Remediation
Please make sure that only trusted entities have access to the device. Furthermore, you should apply the following General Security Measures when operating the product to mitigate the associated security risk. The collected resources "SICK Operating Guidelines" and "ICS-CERT recommended practices on Industrial Security" could help to implement the general security practices.
SCA-2025-0009 · CSAF 2.0 · revision 1 · finalSICK PSIRTVulnerabilities affecting SICK TDC-E210GC
1 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • SICK TDC-E210GC all Firmware versions
Summary
A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.
Remediation
Please make sure that only trusted entities have access to the device. Furthermore, you should apply the following General Security Measures when operating the product to mitigate the associated security risk. The collected resources "SICK Operating Guidelines" and "ICS-CERT recommended practices on Industrial Security" could help to implement the general security practices.
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2025-4686

No EUVD known-exploited evidence

A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
6.8 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionPatch only the product branches with a verified fix

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 8 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
01

What, why and how

A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.

What

A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.

Why

The product detects a specific error, but takes no actions to handle the error.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.

Why

The product detects a specific error, but takes no actions to handle the error.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Reference recorded

CISA Vulnrichment records proof-of-concept exploitation in its SSVC data. BlackTree has not independently executed or validated exploit material.

Likely attack path
a network path → Detection of Error Condition Without Action → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
Required interaction required
Attack complexity
High: exploitation depends on specific conditions
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-390 ↗

CWE-390: Detection of Error Condition Without Action. The product detects a specific error, but takes no actions to handle the error.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-390Public exploit reference
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2025-4686Official EUVD mapping

A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.

Official EUVD record ↗
BSI · German · WID-SEC-2025-1007Apple macOS: Mehrere Schwachstellen

Ein entfernter anonymer Angreifer kann mehrere Schwachstellen in Apple macOS ausnutzen, um erhöhte Privilegien zu erlangen, vertrauliche Informationen offenzulegen, beliebigen Code auszuführen, Daten zu manipulieren, Sicherheitsmaßnahmen zu umgehen oder einen Denial-of-Service-Zustand auszulösen.

Official advisory ↗
BSI · German · WID-SEC-2025-0394OpenSSH: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in OpenSSH ausnutzen, um kryptografische Sicherheitsvorkehrungen zu umgehen und um einen Denial of Service Zustand herbeizuführen.

Official advisory ↗
BSI · German · WID-SEC-2025-1439Dell Secure Connect Gateway: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

Ein Angreifer kann mehrere Schwachstellen in Dell Secure Connect Gateway ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20250219Security Bulletin 19 Feb 2025

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 19 Feb 2025, published on 19 February 2025. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0969Multiples vulnérabilités dans les produits VMware

d?id=CVE-2025-24293 Référence CVE CVE-2025-24294 https://www.cve.org/CVERecord?id=CVE-2025-24294 Référence CVE CVE-2025-24813 https://www.cve.org/CVERecord?id=CVE-2025-24813 Référence CVE CVE-2025-24855 https://www.cve.org/CVERecord?id=CVE-2025-24855 Référence CVE CVE-2025-24928 https://www.cve.org/CVERecord?id=CVE-2025-24928 Référence CVE CVE-2025-24970 https://www.cve.org/CVERecord?id=CVE-2025-24970 Référence CVE CVE-2025-25186 https://www.cve.org/CVERecord?id=CVE-2025-25186 Référence CVE CVE-2025-25193 https://www.cve.org/CVERecord?id=CVE-2025-25193 Référence CVE CVE-2025-25724 https://www.cve.org/CVERecord?id=CVE-2025-25724 Référence CVE CVE-2025-26465 https://www.cve.org/CVERecord?id=CVE-2025-26465 Référence CVE CVE-2025-26603 https://www.cve.org/CVERecord?id=CVE-2025-26603 Référence CVE CVE-2025-27113 https://www.cve.org/CVERecord?id=CVE-2025-27113 Référence CVE CVE-2025-27144 https://www.cve.org/CVERecord?id=CVE-2025-27144 Référence CVE CVE-2025-27210 https://www.cve.org/CVERecord?id=CVE-2025-27210 Référence CVE CVE-2025-27219 https://www.cve.org/CVERecord?id=CVE-2025-27219 Référence CVE CVE-2025-27220 https://www.cve.org/CVERecord?id=CVE-2025-27220 Référence CVE CVE-2025-27221 https://www.cve.org/CVERecord?id=CVE-2025-27221 Référence CVE CVE-2025-27363 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0492Multiples vulnérabilités dans les produits Siemens

E-2024-6119, CVE-2024-6387, CVE-2024-12133, CVE-2024-12243, CVE-2024-24855, CVE-2024-26596, CVE-2024-28085, CVE-2024-33599, CVE-2024-33600, CVE-2024-33601, CVE-2024-33602, CVE-2024-34397, CVE-2024-37370, CVE-2024-37371, CVE-2024-45490, CVE-2024-45491, CVE-2024-45492, CVE-2024-50246, CVE-2024-53166, CVE-2024-57977, CVE-2024-57996, CVE-2024-58005, CVE-2025-4373, CVE-2025-4598, CVE-2025-21701, CVE-2025-21702, CVE-2025-21712, CVE-2025-21724, CVE-2025-21728, CVE-2025-21745, CVE-2025-21756, CVE-2025-21758, CVE-2025-21765, CVE-2025-21766, CVE-2025-21767, CVE-2025-21795, CVE-2025-21796, CVE-2025-21848, CVE-2025-21862, CVE-2025-21864, CVE-2025-21865, CVE-2025-26465, CVE-2025-31115 et CVE-2025-46836. Résumé De multiples vulnérabilités ont été découvertes dans les produits Siemens. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, une élévation de privilèges et un déni de service à distance. Solutions Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité Siemens SSA-082556 du 10 juin 2025 https://cert-portal.siemens.com/productcert/html/ssa-082556.html Bulletin de sécurité Siemens SSA-633269 du 10 juin 2025 https://cert-portal.siemens.com/productcert/html/ssa

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0486Multiples vulnérabilités dans les produits Qnap

ord?id=CVE-2024-50406 Référence CVE CVE-2024-56805 https://www.cve.org/CVERecord?id=CVE-2024-56805 Référence CVE CVE-2024-6387 https://www.cve.org/CVERecord?id=CVE-2024-6387 Référence CVE CVE-2025-22481 https://www.cve.org/CVERecord?id=CVE-2025-22481 Référence CVE CVE-2025-22482 https://www.cve.org/CVERecord?id=CVE-2025-22482 Référence CVE CVE-2025-22484 https://www.cve.org/CVERecord?id=CVE-2025-22484 Référence CVE CVE-2025-22485 https://www.cve.org/CVERecord?id=CVE-2025-22485 Référence CVE CVE-2025-22486 https://www.cve.org/CVERecord?id=CVE-2025-22486 Référence CVE CVE-2025-22490 https://www.cve.org/CVERecord?id=CVE-2025-22490 Référence CVE CVE-2025-26465 https://www.cve.org/CVERecord?id=CVE-2025-26465 Référence CVE CVE-2025-26466 https://www.cve.org/CVERecord?id=CVE-2025-26466 Référence CVE CVE-2025-29871 https://www.cve.org/CVERecord?id=CVE-2025-29871 Référence CVE CVE-2025-29872 https://www.cve.org/CVERecord?id=CVE-2025-29872 Référence CVE CVE-2025-29873 https://www.cve.org/CVERecord?id=CVE-2025-29873 Référence CVE CVE-2025-29876 https://www.cve.org/CVERecord?id=CVE-2025-29876 Référence CVE CVE-2025-29877 https://www.cve.org/CVERecord?id=CVE-2025-29877 Référence CVE CVE-2025-29883 https://www.cve.org/CVERecord?id=CVE-2025-29883 Référence CVE CVE-2025-29884 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0393Multiples vulnérabilités dans les produits Apple

d?id=CVE-2025-24155 Référence CVE CVE-2025-24213 https://www.cve.org/CVERecord?id=CVE-2025-24213 Référence CVE CVE-2025-24220 https://www.cve.org/CVERecord?id=CVE-2025-24220 Référence CVE CVE-2025-24222 https://www.cve.org/CVERecord?id=CVE-2025-24222 Référence CVE CVE-2025-24223 https://www.cve.org/CVERecord?id=CVE-2025-24223 Référence CVE CVE-2025-24225 https://www.cve.org/CVERecord?id=CVE-2025-24225 Référence CVE CVE-2025-24258 https://www.cve.org/CVERecord?id=CVE-2025-24258 Référence CVE CVE-2025-24259 https://www.cve.org/CVERecord?id=CVE-2025-24259 Référence CVE CVE-2025-24274 https://www.cve.org/CVERecord?id=CVE-2025-24274 Référence CVE CVE-2025-26465 https://www.cve.org/CVERecord?id=CVE-2025-26465 Référence CVE CVE-2025-26466 https://www.cve.org/CVERecord?id=CVE-2025-26466 Référence CVE CVE-2025-30440 https://www.cve.org/CVERecord?id=CVE-2025-30440 Référence CVE CVE-2025-30442 https://www.cve.org/CVERecord?id=CVE-2025-30442 Référence CVE CVE-2025-30443 https://www.cve.org/CVERecord?id=CVE-2025-30443 Référence CVE CVE-2025-30448 https://www.cve.org/CVERecord?id=CVE-2025-30448 Référence CVE CVE-2025-30453 https://www.cve.org/CVERecord?id=CVE-2025-30453 Référence CVE CVE-2025-31196 https://www.cve.org/CVERecord?id=CVE-2025-31196 Référence CVE CVE-2025-31200 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0139Multiples vulnérabilités dans OpenSSH

De multiples vulnérabilités ont été découvertes dans OpenSSH. Elles permettent à un attaquant de provoquer un déni de service à distance et un contournement de la politique de sécurité.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2025-002235OpenBSD の OpenSSH 等複数ベンダの製品におけるエラー対応処理のないエラーの検出に関する脆弱性

OpenBSD の OpenSSH 等複数ベンダの製品には、エラー対応処理のないエラーの検出に関する脆弱性が存在します。

Official advisory ↗
NCSC-NL · Dutch · NCSC-2026-0229Kwetsbaarheden verholpen in Siemens producten

OpenSSH versions 6.8p1 to 9.9p1 contain a moderate severity vulnerability in VerifyHostKeyDNS that enables complex machine-in-the-middle attacks through client memory exhaustion, affecting multiple vendors including NetApp and Apple.

Official advisory ↗
NCSC-NL · Dutch · NCSC-2025-0187Kwetsbaarheden verholpen in Siemens producten

De kwetsbaarheden stellen een kwaadwillende mogelijk in staat aanvallen uit te voeren die kunnen leiden tot de volgende categorieën schade: - Denial-of-Service (DoS) - Manipulatie van gegevens - Omzeilen van een beveiligingsmaatregel - Omzeilen van authenticatie - (Remote) code execution (root/admin rechten) - (Remote) code execution (Gebruikersrechten) - Toegang tot systeemgegevens - Toegang tot gevoelige gegevens - Spoofing De kwaadwillende heeft hiervoor toegang nodig tot de productieomgeving. Het is goed gebruik een dergelijke omgeving niet publiek toegankelijk te hebben.

Official advisory ↗
NCSC-NL · Dutch · NCSC-2025-0151Kwetsbaarheden verholpen in Apple macOS

De kwetsbaarheden omvatten verschillende problemen, zoals geheugenbeschadiging door het verwerken van kwaadwillig gemaakte webinhoud, ongeautoriseerde toegang tot gevoelige gebruikersdata, en onverwachte systeemterminaties. Deze kwetsbaarheden kunnen worden misbruikt door kwaadwillenden om zich verhoogde rechten toe te kennen en zo toegang te krijgen tot gevoelige informatie of om de stabiliteit van het systeem in gevaar te brengen.

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix availability varies by product
Affected
Fixed
Action
Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 18 Feb 2025 · Last source change 2 Sept 2026, 01:41 UTC · CWE-390 · Detection of Error Condition Without Action

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2025-4686
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD modified after enrichment

Missing structured fields: affected product. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    6.8p1 ≤ 9.9p1 · Fixed: Red Hat Enterprise Linux 8: 0:8.0p1-26.el8_10 < *; Red Hat Enterprise Linux 9: 0:8.7p1-45.el9 < *; Red Hat Enterprise Linux 9.4 Extended Update Support: 0:8.7p1-38.el9_4.5 < *; Red Hat Discovery 1.14: sha256:f33991d766b618a128fb99fbe4f9b61c5004f7c6aa73b2b38e28d59e56c64d63 < *
    After
    6.8p1 ≤ 9.9p1 · Fixed: Red Hat Enterprise Linux 8: 0:8.0p1-26.el8_10 < *; Red Hat Enterprise Linux 9: 0:8.7p1-45.el9 < *; Red Hat Enterprise Linux 9.4 Extended Update Support: 0:8.7p1-38.el9_4.5 < *; Red Hat Discovery 1.14: 1.14.3-1748529279 < *
    CNA ↗
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    6.8p1 ≤ 9.9p1 · Fixed: 0:8.0p1-26.el8_10 < *; 0:8.7p1-45.el9 < *; 0:8.7p1-38.el9_4.5 < *; sha256:f33991d766b618a128fb99fbe4f9b61c5004f7c6aa73b2b38e28d59e56c64d63 < *
    After
    6.8p1 ≤ 9.9p1 · Fixed: 0:8.0p1-26.el8_10 < *; 0:8.7p1-45.el9 < *; 0:8.7p1-38.el9_4.5 < *; 1.14.3-1748529279 < *
    CNA ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    6.8p1 ≤ 9.9p1 · Fixed: 0:8.0p1-26.el8_10 < *; 0:8.7p1-45.el9 < *; 0:8.7p1-38.el9_4.5 < *; 1.14.3-1748529279 < *
    After
    6.8p1 ≤ 9.9p1 · Fixed: Red Hat Enterprise Linux 8: 0:8.0p1-26.el8_10 < *; Red Hat Enterprise Linux 9: 0:8.7p1-45.el9 < *; Red Hat Enterprise Linux 9.4 Extended Update Support: 0:8.7p1-38.el9_4.5 < *; Red Hat Discovery 1.14: sha256:f33991d766b618a128fb99fbe4f9b61c5004f7c6aa73b2b38e28d59e56c64d63 < *
    CNA ↗
  4. Vendor guidanceAuthoritative vendor guidance changed: added remediation: sick.com/sca-2025-0011.json; removed remediation: endress.com.
    Before
    remediation: endress.com
    After
    remediation: sick.com/sca-2025-0011.json
    SICK PSIRT ↗
  5. Vendor guidanceAuthoritative vendor guidance changed: added remediation: sick.com/special_information_sick_operating_guidelines_cybersecurity_by_sick_en_im0106719.pdf; removed remediation: sick.com/psirt.
    Before
    remediation: sick.com/psirt
    After
    remediation: sick.com/special_information_sick_operating_guidelines_cybersecurity_by_sick_en_im0106719.pdf
    SICK PSIRT ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2025-4686↗Vendor CSAF · Red Hat Product Security↗CISA Vulnrichment SSVC evidence↗Patch or update reference↗Mitigation reference↗CVE authority or vendor reference · Red Hat RHSA-2025:16823↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2025-26465 · cve.blacktree.nl