Local information disclosure via integer overflow
Published Jul 14, 2026 · Updated Jul 14, 2026
Integer overflow in Microsoft Office and SharePoint products allows local users to disclose information from the affected host. Microsoft has not published the affected component, input path, or calculation whose wraparound exposes the information. Exploitation requires local access; the published impact is limited to information disclosure, with no reported data modification or service interruption.
Summary
What happened
Integer overflow in Microsoft Office and SharePoint products allows local users to disclose information from the affected host. Microsoft has not published the affected component, input path, or calculation whose wraparound exposes the information. Exploitation requires local access; the published impact is limited to information disclosure, with no reported data modification or service interruption.
The record
- CVE
- CVE-2026-55026
- Published
- Jul 14, 2026
- Updated
- Jul 14, 2026
- Vendor
- Microsoft
- Product
- Microsoft Office LTSC for Mac 2024
- Classifications
- CWE-190
- 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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