VulnerabilityModified
CVE-2021-28481
Microsoft Exchange Server Remote Code Execution Vulnerability
CRITICAL 9.8EPSS 36.2%
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 36.2%, 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
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 36.24% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- microsoft/exchange server
- Source
- secure@microsoft.com
EPSS 36.2% since 3 November 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
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28481Patch, Vendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28481Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.