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Full vulnerability report · 2026
CVE-2026-62902High confidence

.NET Information Disclosure Vulnerability

Microsoft · .NET 8.0

6.5MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
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.

1 current
CVE-2026-62902 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitydotnet: .NET: Information Disclosure Vulnerability
6 fixed

The vendor explicitly identifies these products or versions as containing the fix.

  • dotnet8-0-main@aarch64 as a component of Red Hat Hardened Images
  • dotnet8-0-main@src as a component of Red Hat Hardened Images
  • dotnet8-0-main@x86_64 as a component of Red Hat Hardened Images
  • dotnet9-0-main@aarch64 as a component of Red Hat Hardened Images
  • dotnet9-0-main@src as a component of Red Hat Hardened Images
  • dotnet9-0-main@x86_64 as a component of Red Hat Hardened Images
Summary
A flaw was found in .NET. This vulnerability allows an unauthorized attacker to disclose sensitive information over a network. The issue arises from the inclusion of functionality from an untrusted control sphere, which can be exploited to reveal data.
Remediation
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
Optional official sources

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

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

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-2026-56410

No EUVD known-exploited evidence

Inclusion of functionality from untrusted control sphere in .NET allows an unauthorized attacker to disclose information over a network.

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
6.5 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

Inclusion of functionality from untrusted control sphere in .NET allows an unauthorized attacker to disclose information over a network.

What

Inclusion of functionality from untrusted control sphere in .NET allows an unauthorized attacker to disclose information over a network.

Why

The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

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

Inclusion of functionality from untrusted control sphere in .NET allows an unauthorized attacker to disclose information over a network.

Why

The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

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.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Protection Mechanism Failure → 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
Low: no specialised conditions are recorded
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-693 ↗

CWE-693: Protection Mechanism Failure. The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

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:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

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.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.INoneIntegrity impact: No direct loss is represented by this metric.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-693
A

Official authority intelligence

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

ENISA EUVD · EUVD-2026-56410Official EUVD mapping

Inclusion of functionality from untrusted control sphere in .NET allows an unauthorized attacker to disclose information over a network.

Official EUVD record
BSI · German · WID-SEC-W-2026-2761Microsoft Developer Tools: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Microsoft Visual Studio Code, Microsoft Windows Server 2012, Microsoft Windows Server 2012 R2, Microsoft Windows Server 2016, Microsoft .NET Framework, Microsoft Windows Server 2019, Microsoft Windows Server 2022, Microsoft Windows Server 2025, Microsoft PowerShell, Microsoft Windows, Microsoft .NET, Microsoft Visual Studio 2022 und Microsoft Visual Studio 2026 ausnutzen, um beliebigen Programmcode auszuführen, um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, und um Sicherheitsvorkehrungen zu umgehen.

Official advisory
CERT-FR · French · CERTFR-2026-AVI-1002Multiples vulnérabilités dans Microsoft .Net

De multiples vulnérabilités ont été découvertes dans Microsoft .Net. 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.

Official advisory
CERT-FR · French · CERTFR-2026-AVI-1001Multiples vulnérabilités dans Microsoft Windows

é Microsoft Windows CVE-2026-62889 du 11 août 2026 Bulletin de sécurité Microsoft Windows CVE-2026-62890 du 11 août 2026 Bulletin de sécurité Microsoft Windows CVE-2026-62892 du 11 août 2026 Bulletin de sécurité Microsoft Windows CVE-2026-62893 du 11 août 2026 Bulletin de sécurité Microsoft Windows CVE-2026-62894 du 11 août 2026 Bulletin de sécurité Microsoft Windows CVE-2026-62898 du 11 août 2026 Bulletin de sécurité Microsoft Windows CVE-2026-62899 du 11 août 2026 Bulletin de sécurité Microsoft Windows CVE-2026-62900 du 11 août 2026 Bulletin de sécurité Microsoft Windows CVE-2026-62901 du 11 août 2026 Bulletin de sécurité Microsoft Windows CVE-2026-62902 du 11 août 2026 Bulletin de sécurité Microsoft Windows CVE-2026-62908 du 11 août 2026 Bulletin de sécurité Microsoft Windows CVE-2026-62909 du 11 août 2026 Bulletin de sécurité Microsoft Windows CVE-2026-65662 du 11 août 2026 Bulletin de sécurité Microsoft Windows CVE-2026-65671 du 11 août 2026 Bulletin de sécurité Microsoft Windows CVE-2026-65672 du 11 août 2026 Bulletin de sécurité Microsoft Windows CVE-2026-65678 du 11 août 2026 Bulletin de sécurité Microsoft Windows CVE-2026-65679 du 11 août 2026 Bulletin de sécurité Microsoft Windows CVE-2026-65681 du 11 août 2026 Bulletin de sécurité Microsoft Windows CVE-2026-65773 du 11 août 2026 Bul

Official advisory
CERT-FR · French · CERTFR-2026-AVI-1004Multiples vulnérabilités dans les produits Microsoft

ulletin de sécurité Microsoft CVE-2026-62829 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-62837 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-62839 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-62871 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-62886 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-62897 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-62898 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-62899 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-62900 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-62901 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-62902 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-62909 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-62910 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-62911 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-62912 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-62913 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-62914 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-62915 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-62917 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-63512 du 11 août 2026 Bulletin de sécurité Microsoft CVE-2026-63514 du 11 août 2026 Bulletin de s

Official advisory
CSIRT Italia · Italian · aggiornamenti-mensili-microsoft-23Aggiornamenti Mensili Microsoft

nuova finestra - - CVE-2026-63514 : apre una nuova finestra - - CVE-2026-63513 : apre una nuova finestra - - CVE-2026-63512 : apre una nuova finestra - - CVE-2026-63508 : apre una nuova finestra - - CVE-2026-62918 : apre una nuova finestra - - CVE-2026-62917 : apre una nuova finestra - - CVE-2026-62915 : apre una nuova finestra - - CVE-2026-62914 : apre una nuova finestra - - CVE-2026-62913 : apre una nuova finestra - - CVE-2026-62912 : apre una nuova finestra - - CVE-2026-62911 : apre una nuova finestra - - CVE-2026-62910 : apre una nuova finestra - - CVE-2026-62909 : apre una nuova finestra - - CVE-2026-62908 : apre una nuova finestra - - CVE-2026-62902 : apre una nuova finestra - - CVE-2026-62901 : apre una nuova finestra - - CVE-2026-62900 : apre una nuova finestra - - CVE-2026-62899 : apre una nuova finestra - - CVE-2026-62898 : apre una nuova finestra - - CVE-2026-62897 : apre una nuova finestra - - CVE-2026-62896 : apre una nuova finestra - - CVE-2026-62894 : apre una nuova finestra - - CVE-2026-62893 : apre una nuova finestra - - CVE-2026-62892 : apre una nuova finestra - - CVE-2026-62890 : apre una nuova finestra - - CVE-2026-62889 : apre una nuova finestra - - CVE-2026-62888 : apre una nuova finestra - - CVE-2026-62887 : apre una nuova finestra - - CVE-2026-62886 : apre una nuova fi

Official advisory
NCSC-NL · Dutch · NCSC-2026-0285Kwetsbaarheden verholpen in Microsoft Developer Tools

A vulnerability in .NET involving the inclusion of functionality from an untrusted control sphere allows unauthorized attackers to disclose sensitive information over a network.

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.
Patch available
Affected
8.0.0 < 8.0.30; 9.0.0 < 9.0.19; 17.14.0 < 17.14.38; 18.0 < 18.8.3
Fixed
dotnet8-0-main@aarch64 as a component of Red Hat Hardened Images; dotnet8-0-main@src as a component of Red Hat Hardened Images; dotnet8-0-main@x86_64 as a component of Red Hat Hardened Images; dotnet9-0-main@aarch64 as a component of Red Hat Hardened Images; dotnet9-0-main@src as a component of Red Hat Hardened Images; dotnet9-0-main@x86_64 as a component of Red Hat Hardened Images
Action
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
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 11 Aug 2026 · Last source change 10 Sept 2026, 15:48 UTC · CWE-693 · Protection Mechanism Failure

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-2026-56410
Product sourceCNA
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceOther authority
NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    dotnet10.0.src as a component of Red Hat Hardened Images · Fixed: dotnet8-0-main@aarch64 as a component of Red Hat Hardened Images; dotnet8-0-main@src as a component of Red Hat Hardened Images; dotnet8-0-main@x86_64 as a component of Red Hat Hardened Images; dotnet9-0-main@aarch64 as a component of Red Hat Hardened Images; dotnet9-0-main@src as a component of Red Hat Hardened Images; dotnet9-0-main@x86_64 as a component of Red Hat Hardened Images
    After
    Fixed: dotnet8-0-main@aarch64 as a component of Red Hat Hardened Images; dotnet8-0-main@src as a component of Red Hat Hardened Images; dotnet8-0-main@x86_64 as a component of Red Hat Hardened Images; dotnet9-0-main@aarch64 as a component of Red Hat Hardened Images; dotnet9-0-main@src as a component of Red Hat Hardened Images; dotnet9-0-main@x86_64 as a component of Red Hat Hardened Images
    Red Hat Product Security ↗
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-2026-56410↗Vendor CSAF · Red Hat Product Security↗CVE authority or vendor reference↗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-2026-62902 · cve.blacktree.nl