CVE-2026-21241
CVSS v3
7
HIGH
EPSS Score
2.6 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Technical details
- Published
- 2026-02-10
- Last Modified
- 2026-02-11
Frequently asked questions
What is CVE-2026-21241?
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Is CVE-2026-21241 actively exploited?
Active exploitation of CVE-2026-21241 has not been confirmed. Its EPSS score was 2.6% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-21241?
CVE-2026-21241 has a CVSS v3 base score of 7 (HIGH severity).
Is CVE-2026-21241 affecting your environment?
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