CVE-2026-62766

Analyzed Analyzed - Analysis Complete

Double Free in Windows Kerberos Elevates Local Privileges

Publication date: 2026-08-11

Last updated on: 2026-08-13

Assigner: Microsoft Corporation

Description

Double free in Windows Kerberos allows an authorized attacker to elevate privileges locally.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-11

Last Modified

2026-08-13

Generated

2026-09-01

AI Q&A

2026-08-12

EPSS Evaluated

2026-08-30

NVD

CVE-2026-62766

EUVD

EUVD-2026-56377

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_11_24h2	to 10.0.26100.9106 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9106 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2704 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2704 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9106 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9106 (exc)
microsoft	windows_server_2025	to 10.0.26100.33222 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-415	The product calls free() twice on the same memory address.

Attack-Flow Graph

Executive Summary

This is a double free vulnerability in Windows Kerberos that allows an authorized attacker to elevate privileges locally. A double free occurs when memory is freed twice, potentially leading to corruption and arbitrary code execution.

Detection Guidance

Detection of this vulnerability requires checking for double free issues in Windows Kerberos components. Microsoft recommends applying the latest security updates to address this issue. No specific detection commands are provided in the available resources.

Impact Analysis

An attacker with local access could exploit this to gain higher privileges on the system, potentially allowing them to install programs, view or delete data, or create new accounts with full user rights.

Compliance Impact

This vulnerability allows local privilege escalation, which could enable unauthorized access to sensitive data or systems. This may violate compliance requirements under GDPR (data protection) and HIPAA (health information security) by exposing protected data or failing to maintain proper access controls.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows Kerberos double free vulnerability. Monitor Microsoft's update guide for the specific patch release.

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