Local code execution via undisclosed use-after-free
Published Apr 14, 2026 · Updated Apr 14, 2026
Use-after-free in Microsoft Word in affected Microsoft 365 Apps and Office LTSC releases allows local users to execute arbitrary code. Microsoft identifies the memory-lifetime error as use-after-free but has not disclosed the affected Word component, object, or operation that reuses freed memory. Exploitation requires local access to an affected Office installation and yields code execution in the Word process; no user interaction is reflected in Microsoft's published vector.
Summary
What happened
Use-after-free in Microsoft Word in affected Microsoft 365 Apps and Office LTSC releases allows local users to execute arbitrary code. Microsoft identifies the memory-lifetime error as use-after-free but has not disclosed the affected Word component, object, or operation that reuses freed memory. Exploitation requires local access to an affected Office installation and yields code execution in the Word process; no user interaction is reflected in Microsoft's published vector.
The record
- CVE
- CVE-2026-33115
- Published
- Apr 14, 2026
- Updated
- Apr 14, 2026
- Vendor
- Microsoft
- Product
- Microsoft Office LTSC for Mac 2024
- Classifications
- CWE-416, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 14, 2026CVE publishedPublication date reported by the CVE source.
- Apr 14, 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 <16.108.26041219
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