MEDIUM Published October 13, 2026

CVE-2026-85866

Exposure of sensitive system information to an unauthorized control sphere in Windows ALPC allows an authorized attacker to disclose information locally.

CVSS base score

4.7 (v3.1)

Severity

MEDIUM

Attack vector

Local

Weakness

CWE-497

Last modified

October 29, 2026

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

microsoft windows 10 1809 microsoft windows 10 21h2 microsoft windows 10 22h2 microsoft windows 11 23h2 microsoft windows 11 24h2 microsoft windows 11 25h2 microsoft windows 11 26h1 microsoft windows 11 26h2 microsoft windows server 2019 microsoft windows server 2022

References

msrc.microsoft.com Patch, Vendor Advisory

View full NVD advisory →

More microsoft vulnerabilities

Published the same day

← Back to CVE watch

CVE-2026-85866

Affected products

References

More microsoft vulnerabilities

Published the same day

Related reading