Code execution via undisclosed use-after-free
Published Oct 14, 2025 · Updated Feb 22, 2026
Use-after-free in Microsoft Excel allows local users to execute code by opening a crafted workbook after user interaction. Microsoft has not disclosed the affected Excel component, the object's lifetime error, or the workbook element that triggers reuse. Successful exploitation requires a user to open the malicious content and runs code in that user's security context.
Summary
What happened
Use-after-free in Microsoft Excel allows local users to execute code by opening a crafted workbook after user interaction. Microsoft has not disclosed the affected Excel component, the object's lifetime error, or the workbook element that triggers reuse. Successful exploitation requires a user to open the malicious content and runs code in that user's security context.
The record
- CVE
- CVE-2025-59224
- Published
- Oct 14, 2025
- Updated
- Feb 22, 2026
- Vendor
- Microsoft
- Product
- Microsoft Office LTSC for Mac 2024
- Classifications
- CWE-416, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 14, 2025CVE publishedPublication date reported by the CVE source.
- Feb 22, 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 <16.102.25101223
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.
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Technologies
Your stack
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Your stack
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