CVE-2021-31178

Medium (5.5) in microsoft. EPSS 16% chance of exploitation in the next 30 days.

EPSS

16% chance of exploitation in the next 30 days; higher than 96% of CVEs (scores of 2026-10-31)

CWE

CWE-191

Published

2021-05-11

Modified

2026-06-17

Record from

the NVD, synced 2026-10-19

Affected

• microsoft:365_apps
• microsoft:excel
• microsoft:office
• microsoft:office_online_server
• microsoft:office_web_apps_server
• microsoft:word

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31178
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31178

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