Local information disclosure through out-of-bounds read
Published Jul 14, 2026 · Updated Jul 14, 2026
Out-of-bounds read in affected Microsoft Office desktop releases allows local users to disclose information after required user interaction. Microsoft has not disclosed the affected component, the processed input, or the missing bounds operation that permits the read. The record does not identify the exposed data, and Microsoft's published vector instead rates availability impact, leaving the exact consequence unresolved.
Summary
What happened
Out-of-bounds read in affected Microsoft Office desktop releases allows local users to disclose information after required user interaction. Microsoft has not disclosed the affected component, the processed input, or the missing bounds operation that permits the read. The record does not identify the exposed data, and Microsoft's published vector instead rates availability impact, leaving the exact consequence unresolved.
The record
- CVE
- CVE-2026-55139
- Published
- Jul 14, 2026
- Updated
- Jul 14, 2026
- Vendor
- Microsoft
- Product
- Microsoft Office LTSC for Mac 2024
- Classifications
- CWE-125
- 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
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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 <16.111.26071215
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.
Weakness, pattern, technique
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
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Your stack
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