CVE-2021-34451

Medium (5.3) in microsoft office online server. EPSS 1.8% chance of exploitation in the next 30 days.

EPSS

1.8% chance of exploitation in the next 30 days; higher than 78% of CVEs (scores of 2026-10-31)

Published

2021-07-16

Modified

2026-08-10

Record from

the NVD, synced 2026-10-19

Affected

• microsoft:office_online_server

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34451
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34451

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