CVE-2021-31178
Microsoft Office Information Disclosure Vulnerability
Microsoft Office Information Disclosure 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
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Microsoft Office Information Disclosure Vulnerability
Microsoft Office Information Disclosure Vulnerability
- Record
CVE-2021-31178- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-18091
Microsoft Office Information Disclosure Vulnerability
- Record
EUVD-2021-18091- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-gr4f-j3r7-9p3j
Microsoft Office Information Disclosure Vulnerability
Microsoft Office Information Disclosure Vulnerability
- Record
GHSA-gr4f-j3r7-9p3j- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N - Weakness
- CWE-191, CWE-200
- Updated
- 2026-11-02
NVD
Microsoft Office Information Disclosure Vulnerability
- Record
CVE-2021-31178- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:P/I:N/A:N - Weakness
- CWE-191
- Updated
- 2026-11-02
Affected products
- microsoft office
- microsoft 365 apps
- microsoft excel
- 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 online server
- microsoft office web apps server 2013 service pack 1
- microsoft office web apps server
Show 1 moreShow less
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-2021-31178 is a medium vulnerability (CVSS 5.5) in Microsoft Office, published May 11, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 16.0%, the 96th percentile. No source names a fixed version.