Code execution via undisclosed untrusted pointer dereference
Published Jan 14, 2025 · Updated Jun 9, 2026
Untrusted pointer dereference in Microsoft Word allows attackers to execute code locally following required user interaction. Microsoft has not disclosed the affected parser or function, the pointer's untrusted source, or the operation that dereferences it. The local vector and interaction requirement mean the flaw is not reached solely by sending network traffic to an Office service.
Summary
What happened
Untrusted pointer dereference in Microsoft Word allows attackers to execute code locally following required user interaction. Microsoft has not disclosed the affected parser or function, the pointer's untrusted source, or the operation that dereferences it. The local vector and interaction requirement mean the flaw is not reached solely by sending network traffic to an Office service.
The record
- CVE
- CVE-2025-21363
- Published
- Jan 14, 2025
- Updated
- Jun 9, 2026
- Vendor
- Microsoft
- Product
- Microsoft Office LTSC for Mac 2024
- Classifications
- CWE-822
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 14, 2025CVE publishedPublication date reported by the CVE source.
- Jun 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 <16.93.25011212
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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