CVE-2026-81399
MediumCVSS 5.5Exploitation Probability (EPSS)
Low risk32th percentile - higher than 32% of all known CVEs
Summary
Buffer over-read vulnerability in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Risk Assessment
The risk is that an unauthorized user could gain local access to sensitive data.
Recommendation
It is recommended to update Microsoft Office Excel to the latest version and restrict local system access.
Other vulnerabilities in Microsoft Office Excel
See all- CVE-2026-40360High
An out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
- CVE-2026-40359High
A use after free vulnerability in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- CVE-2026-20957High
Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- CVE-2026-20956High
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- CVE-2026-20955High
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- CVE-2026-20950High
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- CVE-2026-20949High
Improper access control in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.
- CVE-2026-20946High
An out-of-bounds read vulnerability in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- CVE-2026-85875Medium
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
- CVE-2026-81960High
Heap-based buffer overflow in Microsoft Office Excel. Allows an unauthorized attacker to execute code locally.
Original NVD description (English source)
Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS