CVE-2021-40487 in the critical feed json
Microsoft SharePoint Server Remote Code Execution Vulnerability
published 2021-10-13 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-27664
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 48.2%
- EPSS 48.2% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known
Summary
Microsoft SharePoint Server Remote Code Execution Vulnerability
Patch / fix
- Microsoft Microsoft SharePoint Enterprise Server 2016 16.0.5227.1000
- Microsoft Microsoft SharePoint Server 2019 16.0.10379.20000
- Microsoft Microsoft SharePoint Foundation 2013 Service Pack 1 15.0.5389.1000
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 20 mo ago
Exploit prediction
48.20% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C |
| CNA | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P |
Affected products
- Microsoft Microsoft SharePoint Enterprise Server 2016
- Microsoft Microsoft SharePoint Server 2019
- Microsoft Microsoft SharePoint Foundation 2013 Service Pack 1
Classification
- Weakness
-
- CWE-94 Improper Control of Generation of Code
References
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2021-40487
patch, vendor-advisory
-
zerodayinitiative.com
/advisories/ZDI-21-1225/
third-party-advisory, vdb-entry
Sources
- CVE List CVE-2021-40487
- NVD CVE-2021-40487
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.