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 attacker who successfully exploited this vulnerability could potentially read small portions of heap memory.
Is the Preview Pane an attack vector for this vulnerability?
No, the Preview Pane is not an attack vector.
There are multiple update packages available for some of the affected software. Do I need to install all the updates listed in the Security Updates table for the software?
Yes. Customers should apply all updates offered for the software installed on their systems. If multiple updates apply, they can be installed in any order.
Security updates
16.0.5513.1002 — https://support.microsoft.com/help/5002771
16.0.5513.1002 — https://support.microsoft.com/help/5002772
16.0.10417.20041 — https://support.microsoft.com/help/5002769
16.0.10417.20041 — https://support.microsoft.com/help/5002770
https — https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
16.100.25081015 — https://go.microsoft.com/fwlink/p/?linkid=831049
16.0.5513.1000 — https://support.microsoft.com/help/5002763
Vulnerabilities 1
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Medium 6.8
Microsoft Word Information Disclosure Vulnerability
Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
Revision history
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#2
Revised the packages to include Download Center ID for this vulnerability.
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#1
Information published.
References
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CVE-2025-53736 Microsoft Word Information Disclosure Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53736
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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