CVE-2021-31939
Microsoft Excel Remote Code Execution Vulnerability
7.8 High
Microsoft Excel Remote Code Execution Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
13.3%Up 12.4 points since Jun 9, 2021
What each source reports
CVE List Score used
Microsoft Excel Remote Code Execution Vulnerability
Microsoft Excel Remote Code Execution Vulnerability
- Record
CVE-2021-31939- CVSS 3.1
- 7.8 High
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 - Updated
- 2026-11-02
EUVDEUVD-2021-18812
Microsoft Excel Remote Code Execution Vulnerability
- Record
EUVD-2021-18812- CVSS 3.1
- 7.8 High
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 - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3w8p-33h3-h7v6
Microsoft Excel Remote Code Execution Vulnerability
Microsoft Excel Remote Code Execution Vulnerability
- Record
GHSA-3w8p-33h3-h7v6- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
NVD
Microsoft Excel Remote Code Execution Vulnerability
- Record
CVE-2021-31939- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Updated
- 2026-11-02
Affected products
- microsoft excel
- microsoft 365 apps
- microsoft 365 apps for enterprise
- microsoft excel 2013 service pack 1
- microsoft excel 2016
- microsoft office 2013 service pack 1
- microsoft office 2016
- microsoft office 2019
- microsoft office web apps server 2013 service pack 1
- microsoft office
- microsoft office online server
- microsoft office web apps server
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-31939 is a high vulnerability (CVSS 7.8) in Microsoft Excel, published June 8, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 13.3%, the 96th percentile. No source names a fixed version.