CVE-2026-78521
HighCVSS 8.8Summary
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Risk Assessment
An attacker could remotely execute malicious code on the victim's machine, potentially leading to system takeover or data theft.
Recommendation
Install security updates for Microsoft Office Word and be cautious when opening documents from untrusted sources.
Other vulnerabilities in Microsoft Office Word
See all- CVE-2026-81952High
Heap-based buffer overflow in Microsoft Office Word. Allows an unauthorized attacker to execute code over a network.
- CVE-2026-80085High
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
- CVE-2026-80080High
Double free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
- CVE-2026-78526High
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
- CVE-2026-78517High
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
- CVE-2026-78514High
Use-after-free vulnerability in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
- CVE-2026-78512High
Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
- CVE-2026-78511High
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
- CVE-2026-78507High
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
- CVE-2026-78504High
Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Original NVD description (English source)
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.