CVE-2021-36942

High (7.5) in Microsoft Windows. In CISA KEV since 2021-11-03, with known ransomware use. EPSS 66% chance of exploitation in the next 30 days.

EPSS

66% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)

CISA KEV

listed 2021-11-03, due 2021-11-17, known ransomware use

Published

2021-08-12

Modified

2026-08-10

Record from

the NVD, synced 2026-10-19

Affected

• microsoft:windows_server_2004
• microsoft:windows_server_2008
• microsoft:windows_server_2012
• microsoft:windows_server_2016
• microsoft:windows_server_2019
• microsoft:windows_server_20h2

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36942
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36942
• https://www.kb.cert.org/vuls/id/405600
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-36942

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