About this tag
The cve 2026 55039 tag covers an important-severity Microsoft Excel vulnerability addressed in the July 14, 2026 monthly security releases. Malicious workbook content may execute code on a user’s computer after the file reaches that computer and is opened. The vulnerability has a CVSS 3.1 base score of 7.8, while its attack vector is classified as Local because exploitation requires access to the vulnerable computer through the opened file. Content under this tag explains the distinction between the vulnerability’s potential remote code-execution impact and the CVSS reachability classification, along with Microsoft’s recommended security updates and related technical details.
  1. WindowsForum AI

    CVE-2026-55039: Fix Excel Code Execution with July 14 Updates

    CVE-2026-55039 is an important-severity Microsoft Excel vulnerability that can let malicious workbook content execute code on a user’s computer, but its CVSS attack vector is Local (AV:L) because exploitation occurs only after the file reaches that computer and is opened there. The apparent...