CVE-2026-108455: Microsoft Office PowerPoint out-of-bounds read

CVE-2026-108455 · Severity: medium · CVSS 6.5 · Published 2026-10-15

Microsoft Office PowerPoint contains an out-of-bounds read vulnerability that allows an attacker to disclose sensitive information over a network without requiring authorization or user interaction. An attacker could exploit this flaw to read data from PowerPoint processes and gain access to confidential information such as presentation content or system memory.

Technologies: Microsoft Office PowerPoint. Vendors: Microsoft.

Quick answers

Is CVE-2026-108455 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-108455 being exploited in the wild.
How severe is CVE-2026-108455?
Medium severity, with a CVSS score of 6.5, published 15 October 2026.
Which products and versions are affected?
Microsoft Office PowerPoint.
Is there a fix for CVE-2026-108455?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-108455 attacked?
It is attacked over the network.
Am I affected by CVE-2026-108455?
Check whether you run Microsoft Office PowerPoint. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An out-of-bounds read in PowerPoint's file parsing logic allows remote code execution or information disclosure when processing maliciously crafted presentation files. The vulnerability does not require authentication or local access, making it exploitable over a network. A successful exploitation allows an attacker to read arbitrary memory from the PowerPoint process and leak sensitive data.

Affected products

  • Microsoft Office PowerPoint

Timeline

  • 2026-10-15: advisory

References

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