Windows Common Log File System Driver Elevation of Privilege VulnerabilityVendor advisorypatch
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36955 CVE-2021-36955
HIGHCISA KEVRansomware
Windows Common Log File System Driver Elevation of Privilege Vulnerability
Record summary
CVE-2021-36955 has a selected CVSS score of 7.8 (high); EIP currently links 1 repository PoC. CISA lists CVE-2021-36955 in KEV and reports its use in known ransomware campaigns.
Description
Windows Common Log File System Driver Elevation of Privilege Vulnerability This CVE ID is unique from CVE-2021-36963, CVE-2021-38633.
Description source: GitHub Advisory
Exploitation context
Known exploitation
- CISA KEV
- Listed · Nov 3, 2021 · CISA
- VulnCheck KEV
- Listed · Nov 3, 2021 · VulnCheck
- Reported exploitation
- Observed · VulnCheck
- Ransomware use
- Observed · CISA
Available material
- Repository PoCs
- 1
CISA SSVC decision
ExploitationActive
AutomatableNo
Technical impactTotal
CISA Coordinator · SSVC 2.0.3 · Evaluated Feb 4, 2025 · Source: CVE List
Affected products and versions
Showing 12 of 26| Product | Source | Version range | Status |
|---|---|---|---|
WindowsBrowse Microsoft / Windows | CISA | Version data not supplied | |
Windows 10 Version 1507Browse Microsoft / Windows 10 Version 1507 | CVE List | 10.0.10240.0 to < 10.0.10240.19060 | affected |
Windows 10 Version 1607Browse Microsoft / Windows 10 Version 1607 | CVE List | 10.0.14393.0 to < 10.0.14393.4651 | affected |
Windows 10 Version 1809Browse Microsoft / Windows 10 Version 1809 | CVE List | 10.0.17763.0 to < 10.0.17763.2183 | affected |
| 10.0.0 to < 10.0.17763.2183 | affected | ||
Windows 10 Version 1909Browse Microsoft / Windows 10 Version 1909 | CVE List | 10.0.0 to < 10.0.18363.1801 | affected |
Windows 10 Version 2004Browse Microsoft / Windows 10 Version 2004 | CVE List | 10.0.0 to < 10.0.19041.1237 | affected |
Windows 10 Version 20H2Browse Microsoft / Windows 10 Version 20H2 | CVE List | 10.0.0 to < 10.0.19042.1237 | affected |
Windows 10 Version 21H1Browse Microsoft / Windows 10 Version 21H1 | CVE List | 10.0.0 to < 10.0.19043.1237 | affected |
Windows 7Browse Microsoft / Windows 7 | CVE List | 6.1.0 to < 6.1.7601.25712 | affected |
Windows 7 Service Pack 1Browse Microsoft / Windows 7 Service Pack 1 | CVE List | 6.1.0 to < 6.1.7601.25712 | affected |
Windows 8.1Browse Microsoft / Windows 8.1 | CVE List | 6.3.0 to < 6.3.9600.20120 | affected |
Windows Server 2008 R2 Service Pack 1Browse Microsoft / Windows Server 2008 R2 Service Pack 1 | CVE List | 6.1.7601.0 to < 6.1.7601.25712 | affected |
Proofs of concept
1Repository PoCs
GitHubJiaJinRong12138/CVE-2021-36955-EXPRepository PoCby JiaJinRong12138Stars: 14Not analyzed3 files
References
4nvd.nist.gov
https://nvd.nist.gov/vuln/detail/CVE-2021-36955 portal.msrc.microsoft.com
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36955 cisa.govGovernment resource
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-36955