Microsoft Word heap-based overflow

Summaryinfo

A vulnerability classified as critical was found in Microsoft Word. This vulnerability affects unknown code. Such manipulation leads to heap-based overflow. This vulnerability is documented as CVE-2026-111295. The attack can be executed remotely. There is not any exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Microsoft Word (version unknown). Affected by this issue is an unknown function. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. The product writes past the end of a buffer that was allocated on the heap. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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

The advisory is shared for download at msrc.microsoft.com. This vulnerability is handled as CVE-2026-111295 since 10/15/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 11/10/2026).

Applying a patch is able to eliminate this problem.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Word Processing Software

Vendor

• Microsoft

Name

• Word

License

• commercial

Website

• Vendor: https://www.microsoft.com/

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