CVE-2026-85880: microsoft windows_10_1607, microsoft windows_10_1809, microsoft windows_10_21h2

CVSS 7.8 (high) · listed as exploited by CISA since 2026-09-08 · published 2026-09-08

Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.

Affected products (NVD): microsoft windows_10_1607, microsoft windows_10_1809, microsoft windows_10_21h2, microsoft windows_10_22h2, microsoft windows_server_2012, microsoft windows_server_2016, microsoft windows_server_2019, microsoft windows_server_2022

Fixed in (NVD): 10.0.14393.9512, 10.0.17763.9245, 10.0.19044.7725, 10.0.19045.7725, 10.0.20348.5622

Weakness: CWE-122, CWE-908

Source: NVD CVE-2026-85880

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85880
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-85880

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