Priority reviewCritical

CVE-2026-33824

Microsoft Windows 10 Version 1607, Windows 10 Version 1809, Windows 10 Version 21H2

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

PRIORITY ASSESSMENT

FIRST EPSS indicates an elevated probability of exploitation.

Known exploitationNot established by KEV

Exploit probability55.9%

Technical severityCVSS 9.8

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

Product: Microsoft Windows 10 Version 1607, Windows 10 Version 1809, Windows 10 Version 21H2
Affected versions: >= 10.0.14393.0 < 10.0.14393.9060, >= 10.0.17763.0 < 10.0.17763.8644, >= 10.0.19044.0 < 10.0.19044.7184, >= 10.0.19045.0 < 10.0.19045.7184, >= 10.0.22631.0 < 10.0.22631.6936, >= 10.0.26100.0 < 10.0.26100.8246, >= 10.0.26200.0 < 10.0.26200.8246, >= 10.0.28000.0 < 10.0.28000.1836, >= 10.0.20348.0 < 10.0.20348.5020, >= 10.0.25398.0 < 10.0.25398.2274, >= 10.0.26100.0 < 10.0.26100.32690, < 10.0.14393.9060, < 10.0.17763.8644, < 10.0.19044.7184, < 10.0.19045.7184, < 10.0.22631.6936, < 10.0.26100.8246, < 10.0.26200.8246, < 10.0.28000.1836, < 10.0.20348.5020
Fixed versions: 10.0.14393.9060, 10.0.17763.8644, 10.0.19044.7184, 10.0.19045.7184, 10.0.22631.6936, 10.0.26100.8246, 10.0.26200.8246, 10.0.28000.1836, 10.0.20348.5020, 10.0.25398.2274, 10.0.26100.32690

Confirm exposure before applying a vendor-supported change.

1
Identify
Confirm that Microsoft Windows 10 Version 1607, Windows 10 Version 1809, Windows 10 Version 21H2 and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.