CVE-2026-33824KEV · OVERDUECWE-415

Microsoft Internet Key Exchange (IKE) Service Extensions Double Free Vulnerability

Critical · published April 14, 2026

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 9.8. It is confirmed in active exploitation. It sits in the 75.9th percentile for exploit probability.

65
days past CISA
deadline
CVSS v3.1
9.8
EPSS
2%
Percentile
75.9
In the wild
Confirmed
What it is

Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01619 · 75.9th percentile
Weakness
CWE-415 · Double Free
Published
2026-04-14T22:17Z
KEV added
2026-08-18 · due 2026-08-21
Affected products (23)
ProductVersionsFixed in
microsoft/windows_10_1607< 10.0.14393.906010.0.14393.9060
microsoft/windows_10_1607< 10.0.14393.906010.0.14393.9060
microsoft/windows_10_1809< 10.0.17763.864410.0.17763.8644
microsoft/windows_10_1809< 10.0.17763.864410.0.17763.8644
microsoft/windows_10_21h2< 10.0.19044.718410.0.19044.7184
microsoft/windows_10_21h2< 10.0.19044.718410.0.19044.7184
microsoft/windows_10_21h2< 10.0.19044.718410.0.19044.7184
microsoft/windows_10_22h2< 10.0.19045.718410.0.19045.7184
microsoft/windows_10_22h2< 10.0.19045.718410.0.19045.7184
microsoft/windows_10_22h2< 10.0.19045.718410.0.19045.7184
microsoft/windows_11_23h2< 10.0.22631.693610.0.22631.6936
microsoft/windows_11_23h2< 10.0.22631.693610.0.22631.6936
microsoft/windows_11_24h2< 10.0.26100.824610.0.26100.8246
microsoft/windows_11_24h2< 10.0.26100.824610.0.26100.8246
microsoft/windows_11_25h2< 10.0.26200.824610.0.26200.8246
microsoft/windows_11_25h2< 10.0.26200.824610.0.26200.8246
microsoft/windows_11_26h1< 10.0.28000.183610.0.28000.1836
microsoft/windows_11_26h1< 10.0.28000.183610.0.28000.1836
microsoft/windows_server_2016< 10.0.14393.906010.0.14393.9060
microsoft/windows_server_2019< 10.0.17763.864410.0.17763.8644
microsoft/windows_server_2022< 10.0.20348.502010.0.20348.5020
microsoft/windows_server_2022_23h2< 10.0.25398.227410.0.25398.2274
microsoft/windows_server_2025< 10.0.26100.3269010.0.26100.32690
References (3)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33824 · [email protected]https://unit42.paloaltonetworks.com/autonomous-ai-cyber-attack-campaign/ · 134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-33824 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 25 SEP 03:25Z
    EPSS moved 73% → 2%
    epss
  • 14 APR 16:58Z
    Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability
    cvelistv5