CVE-2026-81393 Advisory
Severity: MEDIUM (CVSS 5.5)
Affected Product:
- Microsoft Defender Business
Vulnerability: Out-of-bounds read in Microsoft Office Excel enables local information disclosure.
KEV Status: Not currently listed as exploited in the wild.
Recommendation: Monitor Microsoft Security Response Center (MSRC) for patch availability and apply updates when released. Restrict local system access where feasible.
Reference: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81393