VulnerabilityModified
CVE-2021-31181
Microsoft SharePoint Remote Code Execution Vulnerability
HIGH 8.8EPSS 29.0%
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 29.0%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
Microsoft SharePoint Remote Code Execution Vulnerability
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 29.01% probability · 98th 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 moved from 28.8% on 24 September 2026 to 29.0% on 3 November 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- http://packetstormsecurity.com/files/163208/Microsoft-SharePoint-Unsafe-Control-And-ViewState-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31181Patch, Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-573/Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/163208/Microsoft-SharePoint-Unsafe-Control-And-ViewState-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31181Patch, Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-573/Third Party Advisory, VDB Entry
- https://packetstorm.news/files/id/163208
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.