HIGH 7.0 NVD

CVE-2026-78457

Use after free in Windows Security Health Service allows an authorized attacker to elevate privileges locally.

Affected Products

microsoft/windows_11_24h2
microsoft/windows_11_25h2
microsoft/windows_11_26h1
microsoft/windows_server_2022
microsoft/windows_server_2025

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78457

Published: 2026-09-08 · Source: NVD · Feed updated: 2026-09-11

This high severity vulnerability with a CVSS score of 7.0 was published on 2026-09-08 via NVD. Affected: microsoft/windows_11_24h2, microsoft/windows_11_25h2, microsoft/windows_11_26h1 and 2 more.

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