CVE-2026-55141
HIGHCVSS 7.8/10EPSS 0.31%
Last modified
CVE-2026-55141 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.. EPSS estimates a 0.31% chance of exploitation in the next 30 days.
Description
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | 365 Apps | All versions |
| Microsoft | Excel | 2016 |
| Microsoft | Microsoft 365 | All versions |
| Microsoft | Office 2019 | All versions |
| Microsoft | Office 2021 | All versions |
| Microsoft | Office 2024 | All versions |
| Microsoft | Office Online Server | < 16.0.10417.20175 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-55141?
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
How severe is CVE-2026-55141?
CVE-2026-55141 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.
How do I fix CVE-2026-55141?
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 2026
- CVE-2026-55135Improper neutralization of input during web page generation …5.4
- CVE-2026-55136Untrusted pointer dereference in Microsoft Office Excel allo…7.8
- CVE-2026-55137Heap-based buffer overflow in Microsoft Office Excel allows …7.8
- CVE-2026-55138Untrusted pointer dereference in Microsoft Office Excel allo…5.5
- CVE-2026-55139Out-of-bounds read in Microsoft Office allows an unauthorize…3.3
- CVE-2026-55140Heap-based buffer overflow in Microsoft Office allows an una…7.8
- CVE-2026-55142Numeric truncation error in Microsoft Office Word allows an …5.5
- CVE-2026-55144Missing cryptographic step in Windows CryptoAPI allows an au…7.1
- CVE-2026-55145Improper neutralization of special elements used in a comman…7.1
- CVE-2026-5515IBM App Connect Enterprise 13.0.1.0 through 13.0.7.0 stores …5.5
- CVE-2026-55153mchange-commons-java is a Java library of shared utility cla…7.1
- CVE-2026-5516IBM WebSphere Application Server - Liberty 22.0.0.11 through…5.9
Are you affected by CVE-2026-55141?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST