Microsoft Office Excel out-of-bounds

Summaryinfo

A vulnerability was found in Microsoft Office. It has been rated as problematic. This issue affects some unknown processing of the component Excel. The manipulation leads to out-of-bounds. This vulnerability is listed as CVE-2026-55044. The attack must be carried out locally. There is no available exploit.

Detailsinfo

A vulnerability was found in Microsoft Office (version unknown) and classified as problematic. This issue affects an unknown function of the component Excel. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

The advisory is shared at msrc.microsoft.com. The identification of this vulnerability is CVE-2026-55044 since 06/16/2026. The exploitation is known to be easy. An attack has to be approached locally. 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 07/15/2026).

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

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Office Suite Software

Vendor

• Microsoft

Name

• Office

License

• commercial

Website

• Vendor: https://www.microsoft.com/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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