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CVE-2021-36942

Windows LSA Spoofing Vulnerability

7.5 HighIn KEV

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.

What does this mean?
Severity
7.5 HighCVSS 3.1, CVE List
Exploit chance
66.0%EPSS, 99th percentile
Exploitation
ExploitedCISA KEV,
Fixed in
No fix listedNo source names one

Description

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

66.0%Up 65.6 points since Aug 13, 2021
90%50%10%1%

Affected products

Show 6 moreShow less

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
MetasploitPetitPotam

What each source reports

CVE List Score used7.5

Windows LSA Spoofing Vulnerability

Windows LSA Spoofing Vulnerability

Record
CVE-2021-36942
CVSS 3.1
7.5 HighCVSS: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-2021-235187.5

Windows LSA Spoofing Vulnerability

Record
EUVD-2021-23518
CVSS 3.1
7.5 HighCVSS: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-47xm5.3

Windows LSA Spoofing Vulnerability

Windows LSA Spoofing Vulnerability

Record
GHSA-p8qf-gcxq-47xm
CVSS 3.1
5.3 MediumCVSS: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 KEVNo 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
NVD7.5

Windows LSA Spoofing Vulnerability

Record
CVE-2021-36942
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:P/A:N
Updated
2026-11-02

History

History
RecordedChangedSources
exploitation
first indexedCVE List, EUVD, GitHub Advisories, CISA KEV, Metasploit, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

References

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