Local code execution via undisclosed use-after-free
Published Jul 8, 2025 · Updated Feb 26, 2026
Use-after-free in Microsoft Office Word allows local users to execute arbitrary code after a user opens a crafted document. Microsoft has not disclosed the affected Word parsing component, the freed object's lifetime error, or the document structure that triggers reuse. Exploitation requires user interaction and runs code in the user's security context; the published record establishes no remote, no-interaction path.
Summary
What happened
Use-after-free in Microsoft Office Word allows local users to execute arbitrary code after a user opens a crafted document. Microsoft has not disclosed the affected Word parsing component, the freed object's lifetime error, or the document structure that triggers reuse. Exploitation requires user interaction and runs code in the user's security context; the published record establishes no remote, no-interaction path.
The record
- CVE
- CVE-2025-49703
- Published
- Jul 8, 2025
- Updated
- Feb 26, 2026
- Vendor
- Microsoft
- Product
- Microsoft Office LTSC for Mac 2024
- Classifications
- CWE-416, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 8, 2025CVE publishedPublication date reported by the CVE source.
- Feb 26, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=16.0.0 <16.99.25071321
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.
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
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo