cve 2026 55058

The cve 2026 55058 tag brings together coverage of a high-severity Microsoft Excel vulnerability addressed in the July 14, 2026, Office security updates. The available discussion explains how a malicious workbook can enable code execution when opened, while the CVSS 3.1 assessment lists a local attack vector. It clarifies that an attacker may deliver the weaponized file remotely, but exploitation is completed on the victim’s device as Excel processes it. This tag is useful for readers tracking the vulnerability’s severity, attack mechanics, Microsoft’s patch, and the security implications for Office users and administrators.