CVE-2021-31176 json
Microsoft Office Remote Code Execution Vulnerability
published 2021-05-11 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-18089
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.0%
- EPSS 3.0% chance of exploitation in 30 days, percentile 87%
- public exploits
- 0
- none known
Summary
Microsoft Office Remote Code Execution Vulnerability
Patch / fix
- Microsoft Microsoft Office 2016 16.0.5161.1002
- Microsoft Microsoft Office 2013 Service Pack 1 15.0.5345.1002
Exploit prediction
3.05% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | 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 |
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
Affected products
- Microsoft Microsoft Office 2019
- Microsoft Microsoft 365 Apps for Enterprise
- Microsoft Microsoft Office 2016
- Microsoft Microsoft Office 2013 Service Pack 1
Classification
- Weakness
-
- CWE-416 Use After Free
References
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2021-31176
patch, vendor-advisory
-
zerodayinitiative.com
/advisories/ZDI-21-575/
third-party-advisory
Sources
- CVE List CVE-2021-31176
- NVD CVE-2021-31176
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.