Information disclosure via out-of-bounds read
Published Jul 14, 2026 · Updated Jul 14, 2026
Out-of-bounds read in Microsoft Office Word allows attackers to disclose process memory through a crafted document opened locally. Microsoft has not disclosed the affected parser or the specific boundary-check failure that causes Word to read beyond an allocated buffer. A user must open the document, and the reported impact is limited to confidentiality with no integrity or availability effect.
Summary
What happened
Out-of-bounds read in Microsoft Office Word allows attackers to disclose process memory through a crafted document opened locally. Microsoft has not disclosed the affected parser or the specific boundary-check failure that causes Word to read beyond an allocated buffer. A user must open the document, and the reported impact is limited to confidentiality with no integrity or availability effect.
The record
- CVE
- CVE-2026-55050
- Published
- Jul 14, 2026
- Updated
- Jul 14, 2026
- Vendor
- Microsoft
- Product
- Microsoft Office LTSC for Mac 2024
- Classifications
- CWE-125, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 14, 2026CVE publishedPublication date reported by the CVE source.
- Jul 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 <16.111.26071215
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