CVE-2021-41357
HIGHCVSS 7.8/10Actively ExploitedEPSS 1.97%
Last modified
CVE-2021-41357 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Win32k Elevation of Privilege Vulnerability. CISA has confirmed active exploitation in the wild. EPSS estimates a 1.97% chance of exploitation in the next 30 days.
Description
Win32k Elevation of Privilege Vulnerability
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 2004 | < 10.0.19041.1288 |
| Microsoft | Windows 10 20h2 | < 10.0.19042.1288 |
| Microsoft | Windows 10 21h1 | < 10.0.19043.1288 |
| Microsoft | Windows 11 21h2 | < 10.0.22000.258 |
| Microsoft | Windows Server 2004 | < 10.0.19041.1288 |
| Microsoft | Windows Server 2022 | < 10.0.20348.288 |
| Microsoft | Windows Server 20h2 | < 10.0.19042.1288 |
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41357Patch, Vendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41357Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-41357US Government Resource
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2021-41357?
Win32k Elevation of Privilege Vulnerability
How severe is CVE-2021-41357?
CVE-2021-41357 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.97% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.
How do I fix CVE-2021-41357?
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
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- 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.
Related CVEs from 2021
- CVE-2021-41351Microsoft Edge (Chrome based) Spoofing on IE Mode4.3
- CVE-2021-41352SCOM Information Disclosure Vulnerability7.5
- CVE-2021-41353Microsoft Dynamics 365 (on-premises) Spoofing Vulnerability5.4
- CVE-2021-41354Microsoft Dynamics 365 (on-premises) Cross-site Scripting Vu…5.4
- CVE-2021-41355.NET Core and Visual Studio Information Disclosure Vulnerabi…5.7
- CVE-2021-41356Windows Denial of Service Vulnerability7.5
- CVE-2021-4136vim is vulnerable to Heap-based Buffer Overflow7.8
- CVE-2021-41360HEVC Video Extensions Remote Code Execution Vulnerability7.8
- CVE-2021-41361Active Directory Federation Server Spoofing Vulnerability5.4
- CVE-2021-41363Intune Management Extension Security Feature Bypass Vulnerab…4.2
- CVE-2021-41365Microsoft Defender for IoT Remote Code Execution Vulnerabili…8.8
- CVE-2021-41366Credential Security Support Provider Protocol (CredSSP) Elev…7.8
Are you affected by CVE-2021-41357?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST