CVE-2021-36942

HIGHNVD 7.59.0▲Trending — 5 sources updated this weekExploited in the wild

7.5

Windows LSA Spoofing Vulnerability

CVSS v3: 7.5
EG Score: 9.0(high)
EPSS: 99.9%
KEV: ⚠ Exploited

Published

August 12, 2021

Last Modified

October 30, 2025

References (5)

secure@microsofthttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36942
secure@microsofthttps://www.kb.cert.org/vuls/id/405600
af854a3a-2127-422b-91ae-364da2661108https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36942
af854a3a-2127-422b-91ae-364da2661108https://www.kb.cert.org/vuls/id/405600
134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-36942

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-290Authentication Bypass by Spoofing

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Microsoft MSRCCVE-2021-369422021-08-10
Windows LSA Spoofing Vulnerability

Data Freshness Timeline

(refreshed 20× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-03 19:09 UTCkev_newly_listed
2026-06-03 16:43 UTCEG score recompute
2026-06-03 16:43 UTCVendor advisory
2026-06-03 16:43 UTCGHSA enrichment
2026-06-03 12:55 UTCEG score recompute
2026-06-03 12:55 UTCVendor advisory
2026-06-03 12:55 UTCGHSA enrichment
2026-06-03 09:08 UTCEG score recompute
2026-06-03 09:08 UTCVendor advisory
2026-06-03 09:08 UTCGHSA enrichment
2026-06-03 05:21 UTCEG score recompute
2026-06-03 05:21 UTCVendor advisory
2026-06-03 05:21 UTCGHSA enrichment
2026-06-03 01:33 UTCEG score recompute
2026-06-03 01:33 UTCVendor advisory
2026-06-03 01:33 UTCGHSA enrichment
2026-06-02 21:45 UTCEG score recompute
2026-06-02 21:45 UTCVendor advisory
2026-06-02 21:45 UTCGHSA enrichment
2026-06-02 20:11 UTCepss_batch

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Metasploit module). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Metasploitauxiliary/scanner/dcerpc/petitpotam✓ verified
First seen Jan 1, 2021
PetitPotam
Open source ↗

Frequently asked(6)

What is CVE-2021-36942?

CVE-2021-36942 is a high vulnerability published on August 12, 2021. Windows LSA Spoofing Vulnerability

When was CVE-2021-36942 disclosed?

CVE-2021-36942 was first published in the National Vulnerability Database on August 12, 2021, with the most recent update on October 30, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-36942 actively exploited?

Yes. CISA added CVE-2021-36942 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Microsoft Windows. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.

What is the CVSS score of CVE-2021-36942?

CVE-2021-36942 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.

Which products are affected by CVE-2021-36942?

CVE-2021-36942 affects Microsoft Windows. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.

How do I remediate CVE-2021-36942?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-36942, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-36942

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Is Your Infrastructure Affected by CVE-2021-36942?

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CVE-2021-36942

Published

Last Modified

References (5)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-36942?

Same vendor

Same CWE

CVE-2021-36942

📅 Published

🔄 Last Modified

🔗 References (5)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-36942?

🔗 Related CVEs(same vendor + same CWE)

Same vendor

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Last Modified

References (5)

Frequently asked(6)

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