Security feature bypass via improper input validation
Published Apr 8, 2025 · Updated Aug 10, 2026
Improper input validation in Microsoft Word allows remote attackers to bypass a security feature through network-delivered content. Microsoft has not disclosed the Word component, accepted extraneous data, validation error, or security control that is bypassed. Exploitation requires user interaction; the Preview Pane is not an attack vector, and Microsoft has not specified the resulting actions.
Summary
What happened
Improper input validation in Microsoft Word allows remote attackers to bypass a security feature through network-delivered content. Microsoft has not disclosed the Word component, accepted extraneous data, validation error, or security control that is bypassed. Exploitation requires user interaction; the Preview Pane is not an attack vector, and Microsoft has not specified the resulting actions.
The record
- CVE
- CVE-2025-29816
- Published
- Apr 8, 2025
- Updated
- Aug 10, 2026
- Vendor
- Microsoft
- Product
- Microsoft Office LTSC for Mac 2024
- Classifications
- CWE-349
- Attack vector
- network
- 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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