- Critical 9.8
- Known exploited (CISA KEV)
CVE-2026-33824
Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network.
Scores
The facts
- Published
- 14 April 2026
- Last changed
- 25 September 2026
- NVD status
- Analyzed
- Severity
- Critical, CVSS 9.8 out of 10 (version 3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- Affects
- microsoft windows 10 1607
- microsoft windows 10 1809
- microsoft windows 10 21h2
- microsoft windows 10 22h2
- microsoft windows 11 23h2
- Known exploited
- Yes. CISA added it to the Known Exploited Vulnerabilities catalogue on 18 August 2026.
- EPSS
- 1.6% chance of exploitation activity in the next 30 days (percentile 76).
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