Code execution via undisclosed use-after-free
Published Sep 9, 2025 · Updated Sep 9, 2025
Use-after-free in Microsoft Office Excel allows local users to execute code when a user opens a crafted workbook. Microsoft identifies the defect as a use-after-free but has not disclosed the affected parser, object-lifetime error, or freed allocation reused by workbook input. Exploitation requires user interaction and executes code in the context of the user who processes the document.
Summary
What happened
Use-after-free in Microsoft Office Excel allows local users to execute code when a user opens a crafted workbook. Microsoft identifies the defect as a use-after-free but has not disclosed the affected parser, object-lifetime error, or freed allocation reused by workbook input. Exploitation requires user interaction and executes code in the context of the user who processes the document.
The record
- CVE
- CVE-2025-54904
- Published
- Sep 9, 2025
- Updated
- Sep 9, 2025
- Vendor
- Microsoft
- Product
- Microsoft Office LTSC for Mac 2024
- Classifications
- CWE-416, T1203, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 9, 2025CVE publishedPublication date reported by the CVE source.
- Sep 9, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=N/A
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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