CVE-2026-78510
HighCVSS 8.4Exploitation Probability (EPSS)
Low risk25th percentile - higher than 25% of all known CVEs
Summary
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Risk Assessment
An unauthorized attacker can locally execute arbitrary code in the user's context, potentially leading to system compromise. However, this requires local access or opening a malicious file.
Recommendation
Update Microsoft Office to the latest patched version. Avoid opening untrusted documents and apply least privilege principles.
Other vulnerabilities in Microsoft Office
See all- CVE-2026-26134High
Integer overflow or wraparound in Microsoft Office allows an authorized attacker to elevate privileges locally.
- CVE-2026-26110High
Microsoft Office has a vulnerability related to resource access using an incompatible type ('type confusion'), allowing an unauthorized attacker to execute code locally.
- CVE-2026-20953High
Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
- CVE-2026-20952High
Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
- CVE-2026-20943High
An untrusted search path vulnerability in Microsoft Office allows an unauthorized attacker to execute code locally.
- CVE-2025-53732High
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
- CVE-2025-49702High
A vulnerability in Microsoft Office related to access of resource using incompatible type ('type confusion') allows an unauthorized attacker to execute code locally.
- CVE-2025-49697High
A heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
- CVE-2025-49696High
An out-of-bounds read in Microsoft Office allows an unauthorized attacker to execute code locally.
- CVE-2025-49695High
A use after free vulnerability in Microsoft Office allows an unauthorized attacker to execute code locally.
Original NVD description (English source)
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS