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Tool Directory

CVE-2021-36942

HighPublished

Windows LSA Spoofing Vulnerability

Published: Aug 12, 2021
Updated: Aug 10, 2026
Assigning CNA: microsoft
Evidence observed: Nov 3, 2021

Primary CVSS

7.5/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS probability estimate

66.0%

High · next 30 days

Percentile: 99.3%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

CISA Known Exploited

This CVE appears in the CISA Known Exploited Vulnerabilities catalog.

Summary

Windows LSA Spoofing Vulnerability

Sources

PetitPotamPoC
PoC tool to coerce Windows hosts to authenticate to other machines via MS-EFSRPC EfsRpcOpenFileRaw or other functions.

Responsible use

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