CVE-2021-31178
MEDIUMCVSS 5.5/10EPSS 16.01%
Last modified
CVE-2021-31178 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Microsoft Office Information Disclosure Vulnerability. EPSS estimates a 16.01% chance of exploitation in the next 30 days.
Description
Microsoft Office Information Disclosure Vulnerability
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Microsoft | 365 Apps | All versions | — |
| Microsoft | Excel | 2013 | Sp1 |
| Microsoft | Excel | 2016 | — |
| Microsoft | Office | 2013 | Sp1 |
| Microsoft | Office | 2016 | — |
| Microsoft | Office | 2019 | — |
| Microsoft | Office Online Server | All versions | — |
| Microsoft | Office Web Apps Server | 2013 | Sp1 |
| Microsoft | Word | 2013 | Sp1 |
| Microsoft | Word | 2016 | — |
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31178Patch, Vendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31178Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-31178?
Microsoft Office Information Disclosure Vulnerability
How severe is CVE-2021-31178?
CVE-2021-31178 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 16.01% probability of exploitation in the next 30 days.
How do I fix CVE-2021-31178?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-31172Microsoft SharePoint Server Spoofing Vulnerability7.1
- CVE-2021-31173Microsoft SharePoint Server Information Disclosure Vulnerabi…5.3
- CVE-2021-31174Microsoft Excel Information Disclosure Vulnerability5.5
- CVE-2021-31175Microsoft Office Remote Code Execution Vulnerability7.8
- CVE-2021-31176Microsoft Office Remote Code Execution Vulnerability7.8
- CVE-2021-31177Microsoft Office Remote Code Execution Vulnerability7.8
- CVE-2021-31179Microsoft Office Remote Code Execution Vulnerability7.8
- CVE-2021-3118EVOLUCARE ECSIMAGING (aka ECS Imaging) through 6.21.5 has mu…9.8
- CVE-2021-31180Microsoft Office Graphics Remote Code Execution Vulnerabilit…7.8
- CVE-2021-31181Microsoft SharePoint Remote Code Execution Vulnerability8.8
- CVE-2021-31182Microsoft Bluetooth Driver Spoofing Vulnerability7.1
- CVE-2021-31183Windows TCP/IP Driver Denial of Service Vulnerability7.5
Are you affected by CVE-2021-31178?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST