Information Disclosure Vulnerability in Windows Update Stack by Microsoft
CVE-2026-122162

5.5MEDIUM

Key Information:

Vendor

Microsoft
Status
Windows 11 Version 24h2
Windows 11 Version 25h2
Windows 11 Version 26h1
Windows 11 Version 26h2
Vendor
CVE Published:
10 November 2026

What is CVE-2026-122162?

An integer underflow vulnerability in the Windows Update Stack allows an authorized attacker to exploit the system, potentially disclosing sensitive information locally. Users may be exposed to unauthorized access to system data that could compromise confidentiality. It is crucial for organizations to apply the latest patches provided by Microsoft to mitigate this risk and protect their systems.

Affected Version(s)

Windows 11 Version 24H2 ARM64-based Systems 10.0.26100.0 < 10.0.26100.9974

Windows 11 Version 25H2 ARM64-based Systems 10.0.26200.0 < 10.0.26200.9974

Windows 11 version 26H1 ARM64-based Systems 10.0.28000.0 < 10.0.28000.3501

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.