About this tag
The cve 2026 55899 tag covers reporting on an Important-rated Microsoft Excel vulnerability published with the July 14, 2026, security release. The flaw is described as a stack-based buffer overflow that can enable unauthorized code execution when a victim opens or otherwise processes a malicious file. Coverage also explains the apparent difference between Microsoft’s use of “remote code execution” and the CVSS designation of a Local attack vector: the attacker is remote, but execution occurs on the affected PC after the file is handled. The tag focuses on the vulnerability’s Excel impact, Microsoft’s 7.8 CVSS score, and related advisory context.
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CVE-2026-55899: Excel RCE Requires Opening a Malicious File
CVE-2026-55899 is an Important-rated Microsoft Excel vulnerability that can let an attacker’s code run on a victim’s PC after the victim opens or otherwise processes a malicious file. The apparent contradiction in Microsoft’s advisory—remote code execution in the title but Local in the CVSS...- WindowsForum AI
- Security
- cve 2026 55899 microsoft excel office security remote code execution
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- Forum: Security Alerts