Summary
Impact: Information Disclosure. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
What type of information could be disclosed by this vulnerability?
An authenticated attacker with permission to upload translation packages and write to a translation target could read protected files within the same SharePoint site collection. Successful exploitation could disclose documents that the attacker's account is not permitted to access.
Is the Preview Pane an attack vector for this vulnerability?
No, the Preview Pane is not an attack vector.
Security updates
16.0.20326.20278 — https://support.microsoft.com/help/5002945
Vulnerabilities 1
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Medium 6.5
Microsoft Office SharePoint Information Disclosure Vulnerability
Authorization bypass through user-controlled key in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.
Revision history
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#1
Information published.
References
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CVE-2026-110057 Microsoft Office SharePoint Information Disclosure Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-110057
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss