CVE-2026-33824
Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network.
Actively exploited
- In the CISA exploited-vulnerabilities catalogue since Aug 18, 2026
- US federal agencies must remediate it by Aug 21, 2026 (BOD 22-01)
- First attack observed 106 days after disclosure
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.
Source: CISA KEV · Sep 8, 2026 Sep 3, 2026 Aug 20, 2026 Aug 18, 2026 Aug 18, 2026 Aug 14, 2026
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected products
| Vendors | Product | Versions |
|---|---|---|
| microsoft | windows 10 1607 | < 10.0.14393.9060 |
| microsoft | windows 10 1809 | < 10.0.17763.8644 |
| microsoft | windows 10 21h2 | < 10.0.19044.7184 |
| microsoft | windows 10 22h2 | < 10.0.19045.7184 |
| microsoft | windows 11 23h2 | < 10.0.22631.6936 |
| microsoft | windows 11 24h2 | < 10.0.26100.8246 |
| microsoft | windows 11 25h2 | < 10.0.26200.8246 |
| microsoft | windows 11 26h1 | < 10.0.28000.1836 |
| microsoft | windows server 2016 | < 10.0.14393.9060 |
| microsoft | windows server 2019 | < 10.0.17763.8644 |
| microsoft | windows server 2022 | < 10.0.20348.5020 |
| microsoft | windows server 2022 23h2 | < 10.0.25398.2274 |
| microsoft | windows server 2025 | < 10.0.26100.32690 |
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