CVE-2021-31179

High (7.8) in microsoft. EPSS 13% chance of exploitation in the next 30 days.

EPSS

13% chance of exploitation in the next 30 days; higher than 96% of CVEs (scores of 2026-10-31)

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

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31179
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31179

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