CVE-2026-108453 Microsoft CVE debrief

Who should care

Defenders responsible for Microsoft Office PowerPoint installations, particularly in networked environments, should assess exposure and prioritize patching to prevent potential information disclosure.

Why it matters

CVE-2026-108453 is a medium-severity vulnerability in Microsoft Office PowerPoint that requires verification and patching to prevent potential information disclosure over the network.

• Potential information disclosure over the network
• Need to verify and apply patches for Microsoft Office PowerPoint
• Monitoring network traffic for potential information disclosure attempts

Technical summary

CVE-2026-108453 is an out-of-bounds read vulnerability in Microsoft Office PowerPoint that allows an unauthorized attacker to disclose information over a network. The vulnerability has a CVSS score of 6.5 and a severity of MEDIUM. It requires verification and patching to prevent potential information disclosure. Defenders should prioritize verifying and applying patches for Microsoft Office PowerPoint.

Defensive priority

Defenders should prioritize verifying and applying patches for Microsoft Office PowerPoint to prevent potential information disclosure.

Recommended defensive actions

• Verify and apply patches for Microsoft Office PowerPoint
• Monitor network traffic for potential information disclosure attempts
• Restrict access to PowerPoint files from untrusted sources

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability, with the NVD entry currently listed as 'Received'. The vulnerability has not been extensively analyzed, and defenders should verify and apply patches for Microsoft Office PowerPoint to prevent potential information disclosure. Additional information may be needed to fully understand the vulnerability's impact and to verify affected systems.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.