Microsoft 365 Apps for Enterprise Word heap-based overflow

Summaryinfo

A vulnerability classified as critical has been found in Microsoft 365 Apps for Enterprise. This affects an unknown function of the component Word. Performing a manipulation results in heap-based overflow. This vulnerability is known as CVE-2025-32717. Remote exploitation of the attack is possible. No exploit is available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability was found in Microsoft 365 Apps for Enterprise (version now known). It has been classified as critical. This affects some unknown processing of the component Word. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code locally.

The advisory is shared at msrc.microsoft.com. This vulnerability is uniquely identified as CVE-2025-32717 since 04/09/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/17/2025).

The vulnerability scanner Nessus provides a plugin with the ID 240113 (Security Updates for Microsoft Word Products (June 2025)), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the databases at Tenable (240113) and EUVD (EUVD-2025-18063). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Microsoft

Name

• 365 Apps for Enterprise

License

• commercial

Website

• Vendor: https://www.microsoft.com/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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