Microsoft Office/Word buffer overflow

Summaryinfo

A vulnerability labeled as critical has been found in Microsoft Office and Word. Affected is an unknown function. Such manipulation leads to buffer overflow. This vulnerability is documented as CVE-2026-64905. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Microsoft Office and Word (the affected version unknown) and classified as critical. Affected by this issue is an unknown part. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Buffer over-read in Microsoft Office Word allows an unauthorized attacker to execute code locally.

The advisory is available at msrc.microsoft.com. This vulnerability is handled as CVE-2026-64905 since 07/20/2026. 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. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 08/11/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Office Suite Software

Vendor

• Microsoft

Name

• Office
• Word

License

• commercial

Website

• Vendor: https://www.microsoft.com/

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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