Patch only the product branches with a verified fix
CISA confirms exploitation in the wild and lists 2025-06-30 as the remediation due date. Verified remediation exists for at least one product or source, but 16 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
Published severityCritical→Operational priority:Critical, unchanged from published severity.unchanged
Evidence used
CISA confirms exploitation in the wild.
A structured source references public exploit or proof-of-concept material.
The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
EPSS is 98.79% 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
Confirm that the asset runs Erlang Erlang/OTP and falls inside the recorded affected range.
Verify the installed build against the product-specific fixed version after deployment.
Validate exposure, authentication requirements and compensating controls in the actual environment.
Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Cross-source reconciliation
Remediation availability differs by product scope
Verified remediation exists for at least one product or source, but 16 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
Siemens ProductCERT: 16 affected or under-investigation product states without a fixed product state in the same current advisory
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.
6 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 release
Source package
Vendor state
Fixed version
Evidence
Alpine v3.21v3.21 · community
erlang
Vendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.
Vendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.
Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.
2 current
SSA-089022 · CSAF 2.0 · revision 2 · interimSiemens ProductCERTSSA-089022: Multiple Vulnerabilities in Third-Party Components in SINEC OS before V3.3
16 known affected
The vendor explicitly identifies these products as affected by this CVE.
RUGGEDCOM RST2428P (6GK6242-6PA00)
SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family
SCALANCE XCH328 (6GK5328-4TS01-2EC2)
SCALANCE XCM324 (6GK5324-8TS01-2AC2)
SCALANCE XCM328 (6GK5328-4TS01-2AC2)
SCALANCE XCM332 (6GK5332-0GA01-2AC2)
SCALANCE XRH334 (24 V DC, 8xFO, CC) (6GK5334-2TS01-2ER3)
SCALANCE XRM334 (230 V AC, 12xFO) (6GK5334-3TS01-3AR3)
SCALANCE XRM334 (230 V AC, 8xFO) (6GK5334-2TS01-3AR3)
SCALANCE XRM334 (24 V DC, 12xFO) (6GK5334-3TS01-2AR3)
SCALANCE XRM334 (24 V DC, 8xFO) (6GK5334-2TS01-2AR3)
Summary
Erlang/OTP is a set of libraries for the Erlang programming language. Prior to versions OTP-27.3.3, OTP-26.2.5.11, and OTP-25.3.2.20, a SSH server may allow an attacker to perform unauthenticated remote code execution (RCE). By exploiting a flaw in SSH protocol message handling, a malicious actor could gain unauthorized access to affected systems and execute arbitrary commands without valid credentials. This issue is patched in versions OTP-27.3.3, OTP-26.2.5.11, and OTP-25.3.2.20. A temporary workaround involves disabling the SSH server or to prevent access via firewall rules.
The vendor explicitly identifies these products as affected by this CVE.
Schneider Electric Galaxy VS Version v6.118.0 and prior
Schneider Electric Galaxy VL Version v18.5.0 and prior
Schneider Electric Galaxy VXL Version v15.21.0 and prior
Summary
Erlang/OTP is a set of libraries for the Erlang programming language. Prior to versions OTP-27.3.3, OTP-26.2.5.11, and OTP-25.3.2.20, a SSH server may allow an attacker to perform unauthenticated remote code execution (RCE). By exploiting a flaw in SSH protocol message handling, a malicious actor could gain unauthorized access to affected systems and execute arbitrary commands without valid credentials. This issue is patched in versions OTP-27.3.3, OTP-26.2.5.11, and OTP-25.3.2.20. A temporary workaround involves disabling the SSH server or to prevent access via firewall rules.
Remediation
Version 6.123.0 of Galaxy VS includes a fix for this vulnerability and is available through your local FSR by contacting Schneider Electric's Customer Care Center.
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-2025-11793
CISA KEV mirrored by ENISA
Erlang/OTP is a set of libraries for the Erlang programming language. Prior to versions OTP-27.3.3, OTP-26.2.5.11, and OTP-25.3.2.20, a SSH server may allow an attacker to perform unauthenticated remote code execution (RCE). By exploiting a flaw in SSH protocol message handling, a malicious actor could gain unauthorized access to affected systems and execute arbitrary commands without valid credentials. This issue is patched in versions OTP-27.3.3, OTP-26.2.5.11, and OTP-25.3.2.20. A temporary workaround involves disabling the SSH server or to prevent access via firewall rules.
EUVD state
Present in the current official mapping
Known exploitation
Recorded by ENISA since 9 Jun 2025. Evidence sources: cisa_kev.
ENISA score
10.0 · CVSS 3.1
Advisory evidence
9 linked advisory records
Explicit mitigation evidence
Only statements that explicitly mention a fix, patch, update, workaround or mitigation are shown here.
csaf_suse · SUSE-SU-2025:1357-1Security update for erlang
csaf_suse · SUSE-SU-2025:1356-1Security update for erlang26
csaf_cisa · ICSA-25-140-07Schneider Electric Galaxy VS, Galaxy VL, Galaxy VXL (Update A)
csaf_ncscnl · NCSC-2025-0137Kwetsbaarheid verholpen in Erlang/OTP SSH-server
Recommended actionPatch only the product branches with a verified fix
CISA confirms exploitation in the wild and lists 2025-06-30 as the remediation due date. Verified remediation exists for at least one product or source, but 16 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
Erlang Erlang/OTP SSH server contains a missing authentication for critical function vulnerability. This could allow an attacker to execute arbitrary commands without valid credentials, potentially leading to unauthenticated remote code execution (RCE). By exploiting a flaw in how SSH protocol messages are handled, a malicious actor could gain unauthorized access to affected systems. This vulnerability could affect various products that implement Erlang/OTP SSH server, including—but not limited to—Cisco, NetApp, and SUSE.
What
Erlang Erlang/OTP SSH server contains a missing authentication for critical function vulnerability. This could allow an attacker to execute arbitrary commands without valid credentials, potentially leading to unauthenticated remote code execution (RCE). By exploiting a flaw in how SSH protocol messages are handled, a malicious actor could gain unauthorized access to affected systems. This vulnerability could affect various products that implement Erlang/OTP SSH server, including—but not limited to—Cisco, NetApp, and SUSE.
Why
A security-sensitive function is reachable without the authentication check that should protect it.
How
An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may execute code or commands in the affected security context.
What
Erlang Erlang/OTP SSH server contains a missing authentication for critical function vulnerability. This could allow an attacker to execute arbitrary commands without valid credentials, potentially leading to unauthenticated remote code execution (RCE). By exploiting a flaw in how SSH protocol messages are handled, a malicious actor could gain unauthorized access to affected systems. This vulnerability could affect various products that implement Erlang/OTP SSH server, including—but not limited to—Cisco, NetApp, and SUSE.
Why
A security-sensitive function is reachable without the authentication check that should protect it.
How
An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may execute code or commands in the affected security context.
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.Confirmed in the wild
CISA added this CVE to its Known Exploited Vulnerabilities catalogue on 2025-06-09.
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
A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.
Likely attack path
a network path → Missing Authentication for Critical Function → execute code or commands in the affected security context
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Changed: exploitation can affect a different security authority
Weakness ?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-306: Missing Authentication for Critical Function. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
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:L/PR:N/UI:N/S:C/C:H/I:H/A:H
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.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SChangedScope: The attack can affect a component governed by a different security authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.
Only matched European and national findings are included. Language selectors and unavailable sources are omitted.
ENISA EUVD · EUVD-2025-11793Known-exploited evidence recorded
Erlang/OTP is a set of libraries for the Erlang programming language. Prior to versions OTP-27.3.3, OTP-26.2.5.11, and OTP-25.3.2.20, a SSH server may allow an attacker to perform unauthenticated remote code execution (RCE). By exploiting a flaw in SSH protocol message handling, a malicious actor could gain unauthorized access to affected systems and execute arbitrary commands without valid credentials. This issue is patched in versions OTP-27.3.3, OTP-26.2.5.11, and OTP-25.3.2.20. A temporary workaround involves disabling the SSH server or to prevent access via firewall rules.
Official EUVD record ↗BSI · German · WID-SEC-2025-0838Erlang/OTP SSH: Schwachstelle ermöglicht Codeausführung
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Erlang/OTP ausnutzen, um beliebigen Programmcode auszuführen.
Official advisory ↗Canadian Centre for Cyber Security · English · AV25-232Erlang security advisory (AV25-232)
On April 16, 2025, Erlang published a security advisory to address a critical vulnerability in the following products:
This vulnerability allows unauthenticated RCE.
Official advisory ↗Cyber Security Agency of Singapore · English · CSA-SB-20250430Security Bulletin 30 Apr 2020
The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 30 Apr 2020, published on 30 April 2025. Open the linked bulletin for the product, severity and reference information published in that issue.
Official advisory ↗Cyber Security Agency of Singapore · English · CSA-SB-20250423Security Bulletin 23 Apr 2025
The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 23 Apr 2025, published on 23 April 2025. Open the linked bulletin for the product, severity and reference information published in that issue.
Official advisory ↗Cyber Security Agency of Singapore · English · CSA-SB-20250417Security Bulletin 17 April 2025
The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 17 April 2025, published on 17 April 2025. Open the linked bulletin for the product, severity and reference information published in that issue.
Official advisory ↗CERT-FR · French · CERTFR-2026-AVI-0101Multiples vulnérabilités dans les produits Siemens
Official advisory ↗CERT-FR · French · CERTFR-2025-AVI-0360Multiples vulnérabilités dans les produits Tenable
De multiples vulnérabilités ont été découvertes dans les produits Tenable. Elles permettent à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur.
Official advisory ↗KISA KrCERT/CC · Korean · KNVD-6494美 CISA 발표 주요 Exploit 정보공유(Update. 2025-06-09)
Erlang Erlang/OTP SSH server contains a missing authentication for critical function vulnerability. This could allow an attacker to execute arbitrary commands without valid credentials, potentially leading to unauthenticated remote code execution (RCE). By exploiting a flaw in how SSH protocol messages are handled, a malicious actor could gain unauthorized access to affected systems. This vulnerability could affect various products that implement Erlang/OTP SSH server, including—but not limited to—Cisco, NetApp, and SUSE.
Erlang/OTP SSH서버에서 발생하는 인증되지 않은 원격 코드 실행(RCE) 취약점(CVE-2025-32433) [1][2][3][4]
Official advisory ↗NCSC-NL · Dutch · NCSC-2025-0137Kwetsbaarheid verholpen in Erlang/OTP SSH-server
De kwetsbaarheid bevindt zich in de SSH-functionaliteit van de getroffen versies van Erlang/OTP. De kwetsbaarheid stelt een ongeauthenticeerde kwaadwillende op afstand in staat om willekeurige code uit te voeren in context van de SSH deamon, door geprepareerde verzoeken naar het kwetsbare systeem te versturen.
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.
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 16 Apr 2025 · Last source change 26 Feb 2026, 18:28 UTC · CWE-306 · Missing Authentication for Critical Function
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
Affected versionsThe structured affected or fixed version information changed.
Before
otp: >= OTP-27.0-rc1, < OTP-27.3.3, >= OTP-26.0-rc1, < OTP-26.2.5.11, < OTP-25.3.2.20 · Fixed: Version 6.123.0 of Galaxy VS includes a fix for this vulnerability and is available through your local FSR by contacting Schneider Electric's Customer Care Center.
After
otp: >= OTP-27.0-rc1, < OTP-27.3.3, >= OTP-26.0-rc1, < OTP-26.2.5.11, < OTP-25.3.2.20 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Affected versionsThe structured affected or fixed version information changed.
Before
>= OTP-27.0-rc1, < OTP-27.3.3; >= OTP-26.0-rc1, < OTP-26.2.5.11; < OTP-25.3.2.20 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
After
otp: >= OTP-27.0-rc1, < OTP-27.3.3, >= OTP-26.0-rc1, < OTP-26.2.5.11, < OTP-25.3.2.20 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Affected versionsThe structured affected or fixed version information changed.
Before
otp: >= OTP-27.0-rc1, < OTP-27.3.3, >= OTP-26.0-rc1, < OTP-26.2.5.11, < OTP-25.3.2.20 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
After
otp: >= OTP-27.0-rc1, < OTP-27.3.3, >= OTP-26.0-rc1, < OTP-26.2.5.11, < OTP-25.3.2.20 · Fixed: Version 6.123.0 of Galaxy VS includes a fix for this vulnerability and is available through your local FSR by contacting Schneider Electric's Customer Care Center.
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.