CVE-2021-43905

Critical (9.6) in microsoft 365 copilot. EPSS 3.1% chance of exploitation in the next 30 days.

EPSS

3.1% chance of exploitation in the next 30 days; higher than 87% of CVEs (scores of 2026-10-31)

Published

2021-12-15

Modified

2026-06-17

Record from

the NVD, synced 2026-10-19

Affected

• microsoft:365_copilot

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43905
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43905

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