CVE-2021-40486Microsoft Word Remote Code Execution Vulnerability
- 7.8HighCVSS base score
- 6.0%Exploitation in 30 daysEPSS · top 6.6% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Microsoft Word Remote Code Execution Vulnerability
Timeline
ID reserved
By microsoft
- 41 days later
· 41 days later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| microsoftCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 6.0% · top 6.6% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
Microsoft · Microsoft SharePoint Enterprise Server 2016
- affected 16.0.0 – < 16.0.5227.1000
Microsoft · Microsoft SharePoint Enterprise Server 2013 Service Pack 1
- affected 15.0.0 – < 15.0.5389.1000
Microsoft · Microsoft SharePoint Server 2019
- affected 16.0.0 – < 16.0.10379.20000
Microsoft · Microsoft Office 2019
- affected 19.0.0 – < https://aka.ms/OfficeSecurityReleases
Microsoft · Microsoft Office Online Server
- affected 16.0.1 – < 16.0.10379.20000
Microsoft · Microsoft Word 2016
- affected 16.0.1 – < 16.0.5227.1000
Microsoft · Microsoft Office Web Apps Server 2013 Service Pack 1
- affected 15.0.1 – < 15.0.5389.1000
Microsoft · Microsoft Word 2013 Service Pack 1
- affected 15.0.1 – < 15.0.5389.1000
Microsoft · Microsoft Word 2013 Service Pack 1
- affected 15.0.1 – < 15.0.5389.1000
References
References2
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40486 (opens in a new tab)x_refsource_MISCx_transferred
- https://www.zerodayinitiative.com/advisories/ZDI-21-1158/ (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-27663 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2021-40486)Record last updated .