Code execution via heap buffer overflow
Published Jul 14, 2026 · Updated Jul 14, 2026
Heap-based buffer overflow in Microsoft Office PowerPoint allows attackers to execute code after required user interaction. Microsoft identifies PowerPoint heap-buffer handling and an associated integer overflow, but does not disclose the malformed input, parser, or faulty length calculation. Successful exploitation requires interaction with attacker-controlled content and grants code execution in the affected user's security context.
Summary
What happened
Heap-based buffer overflow in Microsoft Office PowerPoint allows attackers to execute code after required user interaction. Microsoft identifies PowerPoint heap-buffer handling and an associated integer overflow, but does not disclose the malformed input, parser, or faulty length calculation. Successful exploitation requires interaction with attacker-controlled content and grants code execution in the affected user's security context.
The record
- CVE
- CVE-2026-55043
- Published
- Jul 14, 2026
- Updated
- Jul 14, 2026
- Vendor
- Microsoft
- Product
- Microsoft PowerPoint 2016
- Classifications
- CWE-122, CWE-190, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 14, 2026CVE publishedPublication date reported by the CVE source.
- Jul 14, 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 <16.0.5561.1000
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.
Weakness, pattern, technique
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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