[ CVE-2021-36942 · Published 12 Aug 2021 ]
Microsoft Windows Local Security Authority (LSA) Spoofing Vulnerability
Exploited · CISA KEV CVSS 7.5
EPSS 66%Fix available
[ Why it matters ]Priority signals
- Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2021-11-03
- Known to be used in ransomware campaigns
- EPSS: 66% chance of exploitation in the next 30 days (higher than 99% of CVEs)
[ Description ]Official description
Windows LSA Spoofing Vulnerability
CISA: Microsoft Windows Local Security Authority (LSA) contains a spoofing vulnerability allowing an unauthenticated attacker to call a method on the LSARPC interface and coerce the domain controller to authenticate against another server using NTLM.
[ Fixes ]Fixes and patches
CISA required action (US federal deadline 17 Nov 2021): Apply updates per vendor instructions.
- Patch on msrc.microsoft.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
- Patch on portal.msrc.microsoft.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
[ References ]References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36942PatchVendor Advisory
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36942PatchVendor Advisory
- www.kb.cert.org/vuls/id/405600ExploitThird Party AdvisoryUS Government Resource
- www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource