CVE-2026-68820

Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVSS 3.1

7.0CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.3% chance of exploitation in the next 30 days; higher than 26% of CVEs (scores of 2026-10-25)

CISA KEV

listed 2026-08-11, due 2026-08-25

CWE

CWE-416

Published

2026-08-11

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• 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

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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