CVE-2021-40454

Medium (5.5) in microsoft. EPSS 0.5% chance of exploitation in the next 30 days.

EPSS

0.5% chance of exploitation in the next 30 days; higher than 42% of CVEs (scores of 2026-10-31)

CWE

CWE-312

Published

2021-10-13

Modified

2026-06-17

Record from

the NVD, synced 2026-10-19

Affected

• microsoft:365_apps
• microsoft:office
• microsoft:windows_10
• microsoft:windows_11
• microsoft:windows_8.1
• microsoft:windows_rt_8.1
• microsoft:windows_server
• microsoft:windows_server_2012
• microsoft:windows_server_2016
• microsoft:windows_server_2019
• microsoft:windows_server_2022

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40454
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40454

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