HIGH Published October 13, 2026

CVE-2026-83516

Out-of-bounds read in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.

CVSS base score

7.5 (v3.1)

Severity

HIGH

Attack vector

Network

Weakness

CWE-125

Last modified

October 29, 2026

CVSS vector

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

Affected products

microsoft windows 10 1809 microsoft windows 11 24h2 microsoft windows 11 25h2 microsoft windows 11 26h1 microsoft windows 11 26h2 microsoft windows server 2019 microsoft windows server 2022 microsoft windows server 2025

References

msrc.microsoft.com Vendor Advisory, Patch

View full NVD advisory →

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CVE-2026-83516

Affected products

References

More microsoft vulnerabilities

Published the same day

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