cve.bz

CVE-2021-26855

9.1 criticalKEVEPSS 100%

Critical (9.1) in Microsoft Exchange Server. In CISA KEV since 2021-11-03, with known ransomware use. EPSS 100% chance of exploitation in the next 30 days.

Microsoft Exchange Server Remote Code Execution Vulnerability

Severity

CVSS 3.1

9.1 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS
100% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
CISA KEV
listed 2021-11-03, due 2022-05-03, known ransomware use
CWE
CWE-918
Published
Modified
Record from
the NVD, synced

Affected

References

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