EUVD-2026-73369
GHSA-cf57-gwf5-gmqw
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local low-privilege foothold on the AD CS host is required; heap overflow yields full system compromise with no interaction needed and no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
5DescriptionCVE.org
Heap-based buffer overflow in Active Directory Certificate Services (AD CS) allows an authorized attacker to elevate privileges locally.
Articles & Coverage 1
AnalysisAI
Heap-based buffer overflow in Active Directory Certificate Services (AD CS) on Windows allows a locally authenticated, low-privileged attacker to escalate to full system control. Tracked under ENISA EUVD-2026-73369 and reported directly by Microsoft's security team, the flaw spans Windows Server 2012 through 2025 and multiple Windows 10/11 release tracks. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The Active Directory Certificate Services server role must be explicitly installed and running on the target host - it is not present in a default Windows installation and must be added by an administrator. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately reflects the threat profile: local, low-privilege entry with full CIA impact and no user interaction required. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply Microsoft's patches via Windows Update or the Microsoft Update Catalog; exact fixed build numbers for each OS version are confirmed in the EUVD affected-version ranges and linked from the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62810. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and inventory all AD CS servers running Windows Server 2012 through 2025 in your environment to quantify exposure. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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