EUVD-2026-73071
GHSA-6g74-p8mr-pq79
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AC:H reflects the network-positioning requirement inherent to capture-replay; PR:L confirmed by authorized-attacker prerequisite; full C/I/A impact from code execution.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Authentication bypass by capture-replay in Windows Kerberos allows an authorized attacker to execute code over a network.
AnalysisAI
Capture-replay exploitation of Windows Kerberos authentication enables an attacker with network access and initial credentials to bypass authentication controls and achieve remote code execution. Affected products span virtually every supported Windows client and server release from Windows Server 2012 to Windows 11 26H1 and Windows Server 2025. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must hold at least a low-privilege domain credential (PR:L) to operate within the Kerberos realm and initiate ticket requests. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 8.8 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) reflects network-accessible exploitation requiring only low-level prior authorization, with full confidentiality, integrity, and availability impact. … 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 | The primary remediation is to apply vendor-supplied patches via Windows Update, bringing affected systems to the fixed build versions listed in the EUVD/MSRC advisory: Windows 10 1607/Server 2016 to 10.0.14393.9512 or later, Windows Server 2019/Windows 10 1809 to 10.0.17763.9245 or later, Windows 10 21H2 to 10.0.19044.7725 or later, Windows 10 22H2 to 10.0.19045.7725 or later, Windows 11 23H2 to 10.0.22631.7582 or later, Windows 11/Server 2025 24H2 to 10.0.26100.9445 or later, Windows Server 2022 to 10.0.20348.5622 or later, Windows Server 2025 (Server Core) to 10.0.26100.33438 or later, Windows Server 2012/2012 R2 to their respective fixed builds, Windows 11 25H2 to 10.0.26200.9445, and Windows 11 26H1 to 10.0.28000.2954. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows Server and client systems affected by this vulnerability and prioritize critical systems such as domain controllers, file servers, and business-critical applications for patch deployment. …
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Same weakness CWE-294 – Authentication Bypass by Capture-replay
View allSame technique Authentication Bypass
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External POC / Exploit Code
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