Code execution via undisclosed out-of-bounds read
Published Apr 8, 2025 · Updated Aug 10, 2026
Out-of-bounds read in Microsoft Office products allows attackers to execute code locally after a user opens a malicious file. Microsoft identifies an integer overflow and out-of-bounds read but has not disclosed the affected parser or erroneous arithmetic operation. Exploitation requires user interaction with attacker-supplied content and runs code in the affected application's security context.
Summary
What happened
Out-of-bounds read in Microsoft Office products allows attackers to execute code locally after a user opens a malicious file. Microsoft identifies an integer overflow and out-of-bounds read but has not disclosed the affected parser or erroneous arithmetic operation. Exploitation requires user interaction with attacker-supplied content and runs code in the affected application's security context.
The record
- CVE
- CVE-2025-26642
- Published
- Apr 8, 2025
- Updated
- Aug 10, 2026
- Vendor
- Microsoft
- Product
- Microsoft Office LTSC for Mac 2024
- Classifications
- CWE-125, CWE-190, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 8, 2025CVE publishedPublication date reported by the CVE source.
- Aug 10, 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 <16.96.25041326
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.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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