Local code execution via untrusted pointer dereference
Published Apr 8, 2025 · Updated Aug 10, 2026
Use-after-free code execution in Microsoft Word allows local users to run arbitrary code after a user opens a crafted document. Microsoft identifies the defect as an untrusted pointer dereference but has not disclosed the affected parser, object lifetime error, or document field that triggers stale-memory use. Exploitation requires user interaction and runs code in the context of the user who opens the file; no elevated privilege is required to initiate the attack.
Summary
What happened
Use-after-free code execution in Microsoft Word allows local users to run arbitrary code after a user opens a crafted document. Microsoft identifies the defect as an untrusted pointer dereference but has not disclosed the affected parser, object lifetime error, or document field that triggers stale-memory use. Exploitation requires user interaction and runs code in the context of the user who opens the file; no elevated privilege is required to initiate the attack.
The record
- CVE
- CVE-2025-27747
- Published
- Apr 8, 2025
- Updated
- Aug 10, 2026
- Vendor
- Microsoft
- Product
- Microsoft Office LTSC for Mac 2024
- Classifications
- CWE-822, T1203, 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.
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Technologies
Your stack
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Your stack
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