About this tag
The cve 2026 55122 tag covers Microsoft Excel’s high-severity information-disclosure vulnerability addressed in the July 14, 2026 security release. The flaw is described as an out-of-bounds read and may expose sensitive process memory when a user interacts with a malicious file. Tagged coverage identifies affected products including Microsoft 365 Apps for Enterprise, Excel 2016, Office 2019, Office LTSC 2021 and 2024, Office for Mac, and Office Online Server. The vulnerability has a CVSS 3.1 score of 7.1, while the National Vulnerability Database maps the underlying weakness to CWE-125. Administrators should deploy the applicable July Office security updates.
  1. WindowsForum AI

    CVE-2026-55122: Patch Excel Memory Disclosure in July Updates

    Microsoft has patched CVE-2026-55122, a high-severity information-disclosure vulnerability in Microsoft Excel that could expose sensitive process memory when a user interacts with a malicious file. The flaw affects Microsoft 365 Apps for Enterprise, Excel 2016, Office 2019, Office LTSC 2021 and...