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Fencer Vulns
critical 9.8

CVE-2026-33824 kev in the critical feed json

Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability

published 2026-04-14 6 mo ago modified 2026-10-15 25 d ago also EUVD-2026-22641

cvss
9.8
version 3.1, CNA
cisa kev
Exploited
added 2026-08-18
epss
77.1%
EPSS 77.1% chance of exploitation in 30 days, percentile 99.5%
public exploits
0
none known

Summary

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

Patch / fix

cisa required action Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

  • Microsoft Windows 10 Version 1607 10.0.14393.9060
  • Microsoft Windows 10 Version 1809 10.0.17763.8644
  • Microsoft Windows 10 Version 21H2 10.0.19044.7184
  • Microsoft Windows 10 Version 22H2 10.0.19045.7184
  • Microsoft Windows 11 version 23H2 10.0.22631.6936
  • Microsoft Windows 11 Version 24H2 10.0.26100.8246
  • Microsoft Windows 11 Version 25H2 10.0.26200.8246
  • Microsoft Windows 11 version 26H1 10.0.28000.1836
  • Microsoft Windows Server 2016 10.0.14393.9060
  • Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.9060
  • Microsoft Windows Server 2019 10.0.17763.8644
  • Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.8644
  • Microsoft Windows Server 2022 10.0.20348.5020
  • Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.2274
  • Microsoft Windows Server 2025 10.0.26100.32690
  • Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.32690

Timeline

  1. CISA SSVC: exploitation active
  2. Published
  3. Added to CISA KEV
  4. CISA patch deadline

Known exploited

Added
2 mo ago
Patch by
2026-08-21 (2 mo ago)
Ransomware
Not known
Required action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Vendor, product
Microsoft, Internet Key Exchange (IKE) Service Extensions
CISA name
Microsoft Internet Key Exchange (IKE) Service Extensions Double Free Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
6 mo ago

Exploit prediction

77.05% chance of exploitation in the next 30 days, higher than 99.5% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Microsoft Windows 10 Version 1607
  • Microsoft Windows 10 Version 1809
  • Microsoft Windows 10 Version 21H2
  • Microsoft Windows 10 Version 22H2
  • Microsoft Windows 11 version 23H2
  • Microsoft Windows 11 Version 24H2
  • Microsoft Windows 11 Version 25H2
  • Microsoft Windows 11 version 26H1
  • Microsoft Windows Server 2016
  • Microsoft Windows Server 2016 (Server Core installation)
  • Microsoft Windows Server 2019
  • Microsoft Windows Server 2019 (Server Core installation)
  • Microsoft Windows Server 2022
  • Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)
  • Microsoft Windows Server 2025
  • Microsoft Windows Server 2025 (Server Core installation)

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.