CVE-2026-83951 - Microsoft Defender Business Buffer Over-Read
Severity: MEDIUM (CVSS 5.5)
Affected Product:
- Microsoft Defender Business
Vulnerability Details: Buffer over-read in Microsoft Office Word allows unauthorized local disclosure of information.
KEV Status: Not currently exploited in the wild
Remediation: Apply security updates per Microsoft Security Response Center guidance at: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83951
Recommendation: Prioritize patching within standard update cycles. Local access required for exploitation.