VulnerabilityModified
CVE-2021-26412
Microsoft Exchange Server Remote Code Execution Vulnerability
CRITICAL 9.1EPSS 33.8%
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 33.8%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
Microsoft Exchange Server Remote Code Execution Vulnerability
- CVSS 3.1
- 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 33.76% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- microsoft/exchange server
- Source
- secure@microsoft.com
EPSS 33.8% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.