CVE-2021-36942
Windows LSA Spoofing Vulnerability
Windows LSA Spoofing Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Windows LSA Spoofing Vulnerability
Windows LSA Spoofing Vulnerability
- Record
CVE-2021-36942- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:F/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-23518
Windows LSA Spoofing Vulnerability
- Record
EUVD-2021-23518- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:F/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-p8qf-gcxq-47xm
Windows LSA Spoofing Vulnerability
Windows LSA Spoofing Vulnerability
- Record
GHSA-p8qf-gcxq-47xm- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-290
- Updated
- 2026-11-02
CISA KEV No score
Microsoft Windows Local Security Authority (LSA) Spoofing Vulnerability
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.
- Record
CVE-2021-36942- Weakness
- CWE-749
- Updated
- 2026-11-02
NVD
Windows LSA Spoofing Vulnerability
- Record
CVE-2021-36942- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Updated
- 2026-11-02
Affected products
- microsoft windows
- microsoft windows server 2008 r2 service pack 1
- microsoft windows server 2008 r2 service pack 1 (server core installation)
- microsoft windows server 2008 service pack 2
- microsoft windows server 2008 service pack 2 (server core installation)
- microsoft windows server 2012
- microsoft windows server 2012 (server core installation)
- microsoft windows server 2012 r2
- microsoft windows server 2012 r2 (server core installation)
- microsoft windows server 2016
- microsoft windows server 2016 (server core installation)
- microsoft windows server 2019
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Metasploit | PetitPotam |
History
| Recorded | Changed | Sources |
|---|---|---|
| exploitation | ||
| first indexed | CVE List, EUVD, GitHub Advisories, CISA KEV, Metasploit, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-36942 is a high vulnerability (CVSS 7.5) in Microsoft Windows, published August 12, 2021. CISA lists it as known to be exploited, since November 3, 2021. EUVD reports exploitation since November 3, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 66.0%, the 99th percentile. No source names a fixed version.
References
msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36942
kb.cert.org/vuls/id/405600
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36942
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-36942
nvd.nist.gov/vuln/detail/CVE-2021-36942
github.com/advisories/GHSA-p8qf-gcxq-47xm