CVE-2021-43238

High (7.8) in microsoft. EPSS 0.9% chance of exploitation in the next 30 days.

EPSS

0.9% chance of exploitation in the next 30 days; higher than 60% of CVEs (scores of 2026-11-01)

CWE

CWE-59

Published

2021-12-15

Modified

2026-06-17

Record from

the NVD, synced 2026-10-19

Affected

• microsoft:windows_10
• microsoft:windows_11
• microsoft:windows_7
• microsoft:windows_8.1
• microsoft:windows_rt_8.1
• microsoft:windows_server
• microsoft:windows_server_2008
• microsoft:windows_server_2012
• microsoft:windows_server_2016
• microsoft:windows_server_2019

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43238
• https://www.zerodayinitiative.com/advisories/ZDI-22-019/
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43238
• https://www.zerodayinitiative.com/advisories/ZDI-22-019/

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