VulnerabilityModified
CVE-2021-40487
Microsoft SharePoint Server Remote Code Execution Vulnerability
HIGH 8.1EPSS 48.2%
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 48.2%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
Description
Microsoft SharePoint Server Remote Code Execution Vulnerability
- CVSS 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 48.20% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-94
- Affected
- microsoft/sharepoint enterprise server · microsoft/sharepoint foundation · microsoft/sharepoint server
- Source
- secure@microsoft.com
EPSS 48.2% 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-2021-40487Patch, Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-1225/Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40487Patch, Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-1225/Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.