cve 2026 55948

CVE-2026-55948 is a high-severity Microsoft Excel vulnerability that can let an attacker run arbitrary code after a user opens a malicious workbook. Microsoft published the flaw on July 14, 2026, with a CVSS 3.1 score of 7.8 and the vector AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. The apparent...