CVE-2026-81386
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk28th percentile - higher than 28% of all known CVEs
Summary
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Risk Assessment
An attacker could execute arbitrary code in the user's context, potentially leading to data confidentiality and integrity breaches.
Recommendation
Install the latest security updates for Microsoft Office Excel.
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)
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS