CVE-2021-41357
CVE-2021-41357 is a high-severity vulnerability in Microsoft Windows 10 2004 with a CVSS 3.x base score of 7.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-04-25).
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- CVSS v2: 4.6
- EPSS exploit prediction: 2% (78th percentile)
- Actively exploited: Yes — listed in CISA KEV (added 2022-04-25)
- EU (EUVD) id: EUVD-2021-28385
- EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-04-25)
- Affected product: Microsoft Windows 10 2004
- Published:
- Last modified:
Description
Win32k Elevation of Privilege Vulnerability
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 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-41357 being actively exploited?
- Yes. CVE-2021-41357 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-04-25, which means active exploitation has been confirmed. It should be prioritised for remediation.
- What products are affected by CVE-2021-41357?
- CVE-2021-41357 primarily affects Microsoft Windows 10 2004. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2021-41357?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
- Does CVE-2021-41357 have an EU (EUVD) identifier?
- Yes. CVE-2021-41357 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-28385. It is also flagged as exploited in the EUVD (since 2022-04-25).
- When was CVE-2021-41357 published?
- CVE-2021-41357 was published on 2021-10-13 and last updated on 2026-06-17.
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41357
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-41357
Affected products (7)
- cpe:2.3:o:microsoft:windows_10_2004:*:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_10_21h1:*:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_20h2:*:*:*:*:*:*:*:*
More vulnerabilities in Microsoft Windows 10 2004
- CVE-2021-31166 — Critical (CVSS 9.8): HTTP Protocol Stack Remote Code Execution Vulnerability
- CVE-2021-40444 — High (CVSS 8.8): <p>Microsoft is investigating reports of a remote code execution vulnerability in MSHTML that affects Microsoft…
- CVE-2021-33739 — High (CVSS 8.4): Microsoft DWM Core Library Elevation of Privilege Vulnerability
- CVE-2022-38396 — High (CVSS 7.8): HP Factory Preinstalled Images on certain systems that shipped with Windows 10 versions 20H2 and earlier OS versions…
- CVE-2021-43226 — High (CVSS 7.8): Windows Common Log File System Driver Elevation of Privilege Vulnerability
- CVE-2021-40450 — High (CVSS 7.8): Win32k Elevation of Privilege Vulnerability