CVE-2025-21340
MEDIUMCVSS 5.5/10EPSS 0.44%
Last modified
CVE-2025-21340 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Windows Virtualization-Based Security (VBS) Security Feature Bypass Vulnerability. EPSS estimates a 0.44% chance of exploitation in the next 30 days.
Description
Windows Virtualization-Based Security (VBS) Security Feature Bypass Vulnerability
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 1809 | < 10.0.17763.6775 |
| Microsoft | Windows 10 21h2 | < 10.0.19044.5371 |
| Microsoft | Windows 10 22h2 | < 10.0.19045.5371 |
| Microsoft | Windows 11 22h2 | < 10.0.22621.4751 |
| Microsoft | Windows 11 23h2 | < 10.0.22631.4751 |
| Microsoft | Windows 11 24h2 | < 10.0.26100.2894 |
| Microsoft | Windows Server 2019 | < 10.0.17763.6775 |
| Microsoft | Windows Server 2022 | < 10.0.20348.3091 |
| Microsoft | Windows Server 2022 23h2 | < 10.0.25398.1369 |
| Microsoft | Windows Server 2025 | < 10.0.26100.2894 |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21340Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2025-21340?
Windows Virtualization-Based Security (VBS) Security Feature Bypass Vulnerability
How severe is CVE-2025-21340?
CVE-2025-21340 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.
How do I fix CVE-2025-21340?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
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Are you affected by CVE-2025-21340?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST