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CVE-2021-36942: Microsoft Windows Local Security Authority (LSA) Spoofing Vulnerability
Microsoft Windows · in CISA KEV since 2021-11-03
2021-11-03added to KEV
2021-11-17federal remediation due date
66.02%EPSS exploit probability (30 days) 99.2th percentile
7.5 HIGHCVSS 3.1
Knownknown ransomware use
83days from NVD publication to KEV
What it is
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.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-749 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD published | 2021-08-12 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2021-36942.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.