CVE-2025-49711: 
vulnerability analysis and mitigation

CVE-2025-49711 is a use-after-free vulnerability discovered in Microsoft Office Excel that was disclosed on July 8, 2025. The vulnerability affects Microsoft Excel and allows an unauthorized attacker to execute code locally on affected systems (NVD CVE).

The vulnerability is classified as a use-after-free (CWE-416) vulnerability with a CVSS v3.1 base score of 7.8 (HIGH) and vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. This indicates that the vulnerability requires local access and user interaction but no privileges, while potentially providing high impacts to confidentiality, integrity, and availability (NVD CVE).

If successfully exploited, this vulnerability allows an unauthorized attacker to execute arbitrary code locally on the affected system with the privileges of the current user. The high CVSS score indicates severe potential impacts to system confidentiality, integrity, and availability (NVD CVE).

Microsoft has released a security update to address this vulnerability as part of the July 2025 security updates. The fix is included in security update package KB5002740. Users are advised to apply the security update through Microsoft Update, Microsoft Update Catalog, or Microsoft Download Center (Microsoft Support).