CVE-2026-108440: microsoft microsoft 365 apps for enterprise Stack-based Buffer Overflow

Vulnerability summary

CVE-2026-108440 is a high (CVSS 8.8) Stack-based Buffer Overflow vulnerability in microsoft microsoft 365 apps for enterprise. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 36.9% of scored vulnerabilities.

Timeline

1. 15-10-2026
   PublishedVulnerability first disclosed.
2. 17-10-2026
   Last modifiedVulnerability information updated.

Description

Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

• 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).