CVE-2025-53732: 
vulnerability analysis and mitigation

CVE-2025-53732 is a heap-based buffer overflow vulnerability discovered in Microsoft Office. The vulnerability was initially disclosed on August 12, 2025, and was last modified in the National Vulnerability Database (NVD) on August 15, 2025. This security flaw affects multiple versions of Microsoft Office, including both Android and Universal platforms, specifically versions up to (but not including) 16.0.19127.20000 for Android and 16.0.14326.22618 for Universal platforms (NVD).

The vulnerability is classified as a heap-based buffer overflow (CWE-122) and out-of-bounds write (CWE-787). It has received a CVSS v3.1 base score of 7.8 (HIGH), with the following vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. This scoring indicates that the vulnerability requires local access and user interaction, but no privileges, while potentially impacting confidentiality, integrity, and availability at high levels (NVD).

The vulnerability allows an unauthorized attacker to execute code locally on affected systems. Given the high CVSS scores for confidentiality, integrity, and availability, successful exploitation could result in complete compromise of the affected system (NVD).

Microsoft has acknowledged the vulnerability and provided information through their Security Response Center. Affected users should update their Microsoft Office installations to versions newer than 16.0.19127.20000 for Android and 16.0.14326.22618 for Universal platforms (NVD).

The vulnerability was included in Microsoft's August 2025 Patch Tuesday release, alongside other security updates for various Microsoft products (Fortra).