Code execution via undisclosed out-of-bounds read
Published May 13, 2025 · Updated Feb 26, 2026
Out-of-bounds read in Outlook in Microsoft Office suites allows remote attackers to execute code when a user opens a crafted file. Microsoft has not disclosed the affected parser, file format, or the specific bounds-checking error that reads beyond an allocated buffer. Exploitation requires user interaction, runs code in the user's context, and cannot be triggered through the Outlook Preview Pane.
Summary
What happened
Out-of-bounds read in Outlook in Microsoft Office suites allows remote attackers to execute code when a user opens a crafted file. Microsoft has not disclosed the affected parser, file format, or the specific bounds-checking error that reads beyond an allocated buffer. Exploitation requires user interaction, runs code in the user's context, and cannot be triggered through the Outlook Preview Pane.
The record
- CVE
- CVE-2025-32705
- Published
- May 13, 2025
- Updated
- Feb 26, 2026
- Vendor
- Microsoft
- Product
- Microsoft Office LTSC 2021
- Classifications
- CWE-125, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 13, 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
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=16.0.1 <https://aka.ms/OfficeSecurityReleases
What conditions does exploitation require?
What is affected?
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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