CVE-2026-63529
MEDIUMCVSS 5.5/10EPSS 0.35%
Last modified
CVE-2026-63529 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.. EPSS estimates a 0.35% chance of exploitation in the next 30 days.
Description
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | 365 Apps | All versions |
| Microsoft | Office 2016 | All versions |
| Microsoft | Office 2019 | All versions |
| Microsoft | Office 2021 | All versions |
| Microsoft | Office 2024 | All versions |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-63529?
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.
How severe is CVE-2026-63529?
CVE-2026-63529 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.35% probability of exploitation in the next 30 days.
How do I fix CVE-2026-63529?
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-2026-63523Improper neutralization of input during web page generation …6.1
- CVE-2026-63524Out-of-bounds read in Microsoft Office allows an unauthorize…5.5
- CVE-2026-63525Numeric truncation error in Microsoft Office Word allows an …7.8
- CVE-2026-63526Stack-based buffer overflow in Microsoft Office allows an un…7.8
- CVE-2026-63527Stack-based buffer overflow in Microsoft Office Word allows …7.8
- CVE-2026-63528Out-of-bounds read in Microsoft Office Word allows an unauth…5.5
- CVE-2026-63530Out-of-bounds read in Microsoft Office Word allows an unauth…5.5
- CVE-2026-63531Out-of-bounds read in Microsoft Office Word allows an unauth…5.5
- CVE-2026-63532Integer overflow or wraparound in Microsoft Office allows an…7.8
- CVE-2026-63533Heap-based buffer overflow in Microsoft Office allows an una…7.8
- CVE-2026-6354Rejected reason: Voluntarily withdrawn
- CVE-2026-63545Sharp and Toshiba Tec MFPs (multifunction printers) caches d…2.4
Are you affected by CVE-2026-63529?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST