CVE-2021-40456
MEDIUMCVSS 5.3/10EPSS 2.21%
Last modified
CVE-2021-40456 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Windows AD FS Security Feature Bypass Vulnerability. EPSS estimates a 2.21% chance of exploitation in the next 30 days.
Description
Windows AD FS Security Feature Bypass Vulnerability
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows Server | 20h2 |
| Microsoft | Windows Server 2019 | All versions |
| Microsoft | Windows Server 2022 | All versions |
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40456Patch, Vendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40456Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-40456?
Windows AD FS Security Feature Bypass Vulnerability
How severe is CVE-2021-40456?
CVE-2021-40456 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 2.21% probability of exploitation in the next 30 days.
How do I fix CVE-2021-40456?
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.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-40456?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST