EUVD-2026-43855
GHSA-xrh5-vqqv-gc4m
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from Vendor (microsoft) · only source for this CVE.
CVSS VectorVendor: microsoft
Lifecycle Timeline
2DescriptionCVE.org
Stack-based buffer overflow in Active Directory Federation Services allows an unauthorized attacker to deny service over a network.
AnalysisAI
Denial of service in Microsoft Active Directory Federation Services (AD FS) lets a remote, unauthenticated attacker crash the service by triggering a stack-based buffer overflow (CWE-121) over the network. Because AD FS commonly fronts single sign-on for Microsoft 365, SaaS, and internal web applications, a successful crash can knock out federated authentication for an entire organization. No public exploit identified at time of analysis, and the flaw is availability-only — confidentiality and integrity are not impacted per the CVSS vector.
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Same weakness CWE-121 – Stack-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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