VULNERABILITY INTELLIGENCE
CVE-2021-26855
CVSS score9.1 CRITICAL
EPSS probability100.00%
CISA KEVKnown exploited vulnerability
Published2021-03-03
Last modified2026-08-19
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Known Exploited Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
Vendor / product: Microsoft / Exchange Server
Description
Microsoft Exchange Server Remote Code Execution Vulnerability
Weakness classification
- nvd@nist.gov: CWE-918
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-918
Primary references
- secure@microsoft.com — Patch, Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory, VDB Entry
- af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory, VDB Entry
- af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory, VDB Entry
- af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory, VDB Entry
- af854a3a-2127-422b-91ae-364da2661108 — Patch, Vendor Advisory
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 — US Government Resource