CVE-2026-96995: microsoft 365_apps Stack-based Buffer Overflow

Vulnerability summary

CVE-2026-96995 is a high (CVSS 7.8) Stack-based Buffer Overflow vulnerability in microsoft 365_apps. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 21.2% of scored vulnerabilities.

Timeline

1. 13-10-2026
   PublishedVulnerability first disclosed.
2. 16-10-2026
   Last modifiedVulnerability information updated.

Description

Stack-based buffer overflow in Microsoft Office Word allows an authorized attacker to elevate privileges locally.

• CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
• CWE-197Numeric Truncation ErrorTruncation errors occur when a primitive is cast to a primitive of a smaller size and data is lost in the conversion.