Local information disclosure via out-of-bounds read
Published Sep 8, 2026 · Updated Sep 9, 2026
An out-of-bounds read in Microsoft Office PowerPoint allows attackers to disclose information after a crafted file is opened. Microsoft has not disclosed the affected parser or data structure, or the operation that reads past its allocated boundary. Exploitation requires user interaction on an affected local installation, and the reported consequence is limited to information disclosure.
Summary
What happened
An out-of-bounds read in Microsoft Office PowerPoint allows attackers to disclose information after a crafted file is opened. Microsoft has not disclosed the affected parser or data structure, or the operation that reads past its allocated boundary. Exploitation requires user interaction on an affected local installation, and the reported consequence is limited to information disclosure.
The record
- CVE
- CVE-2026-78513
- Published
- Sep 8, 2026
- Updated
- Sep 9, 2026
- Vendor
- Microsoft
- Product
- Microsoft PowerPoint 2016
- Classifications
- CWE-125, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=16.0.0 <16.0.5569.1002
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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