CVE-2026-68820: microsoft windows_10_1607, microsoft windows_10_1809, microsoft windows_10_21h2

CVSS 7.0 (high) · listed as exploited by CISA since 2026-08-11 · published 2026-08-11

Use after free in Windows Ancillary Function Driver for WinSock 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_11_23h2, microsoft windows_11_24h2, microsoft windows_11_25h2, microsoft windows_11_26h1, microsoft windows_server_2012, microsoft windows_server_2016, microsoft windows_server_2019, microsoft windows_server_2022, microsoft windows_server_2025

Fixed in (NVD): 10.0.14393.9418, 10.0.17763.9115, 10.0.19044.7663, 10.0.19045.7663, 10.0.22631.7517, 10.0.26100.9106, 10.0.26200.9106, 10.0.28000.2704, 10.0.20348.5440, 10.0.26100.33222

Weakness: CWE-416

Source: NVD CVE-2026-68820

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68820
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-68820

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