CVE-2021-31209

Medium (6.5) in microsoft exchange server. EPSS 2.6% chance of exploitation in the next 30 days.

EPSS

2.6% chance of exploitation in the next 30 days; higher than 85% of CVEs (scores of 2026-10-31)

CWE

CWE-290

Published

2021-05-11

Modified

2026-06-17

Record from

the NVD, synced 2026-10-19

Affected

• microsoft:exchange_server

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31209
• https://www.zerodayinitiative.com/advisories/ZDI-21-615/
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31209
• https://www.zerodayinitiative.com/advisories/ZDI-21-615/

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