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CVE-2026-62766: Windows Kerberos Elevation of Privilege Vulnerability

highCVSS 7CVE-2026-62766
Double free in Windows Kerberos allows an authorized attacker to elevate privileges locally.

CSIRTS triage

vendor: Microsoftproduct: Windows KerberosPrivilege escalationMemory corruption
What
Double free vulnerability in Kerberos allows privilege escalation through memory corruption.
Who is affected
Authorized local attackers on Windows systems using Kerberos authentication.
Urgency
High severity (CVSS 7.0); not exploited yet but Kerberos is fundamental to domain authentication.
Action
Apply the latest Windows security patch addressing CVE-2026-62766.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 7
Published
2026-08-11
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62766

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-62766coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Windows Kerberos Elevation

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from Microsoft Security Response Center