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PatchSiren cyber security CVE debrief

CVE-2025-53732 Microsoft CVE debrief

CVE-2025-53732 is a Microsoft Office heap-based buffer overflow that can let an unauthorized attacker execute code locally. NVD rates the issue CVSS 7.8 (HIGH), and the vector indicates low attack complexity, no privileges required, user interaction required, and high impact to confidentiality, integrity, and availability. Because the weakness can lead to code execution, patching and exposure review should be treated as a priority for Office deployments covered by Microsoft’s advisory and the NVD listing.

Vendor
Microsoft
Product
Office
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2025-08-12
Original CVE updated
2025-08-15
Advisory published
2025-08-12
Advisory updated
2025-08-15

Who should care

Security and IT teams responsible for Microsoft Office patching, endpoint management, and application control should care most. This is especially important for environments where users regularly open untrusted documents or where Office is installed on managed workstations and mobile devices included in the NVD CPE criteria.

Technical summary

The available source corpus describes a heap-based buffer overflow in Microsoft Office. NVD maps the primary weakness to CWE-787 and Microsoft’s advisory also references CWE-122. The CVSS vector is CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, indicating the attack is local, requires user interaction, and can result in code execution with high impact. NVD’s CPE criteria list Microsoft Office as vulnerable for a universal build family ending before 16.0.14326.22618 and an Android build family ending before 16.0.19127.20000.

Defensive priority

High. The combination of code execution potential, user interaction, and broad impact warrants prompt validation and remediation in affected Office installations.

Recommended defensive actions

  • Review Microsoft’s advisory for CVE-2025-53732 and confirm whether your Office versions fall within the NVD-listed vulnerable CPE ranges.
  • Prioritize patch deployment for affected Office installations, including the version families identified in the NVD criteria.
  • Hunt for and inventory Office installations that may be exposed through document workflows, email attachments, or other user-driven entry points.
  • Apply compensating controls where patching is delayed, such as attachment filtering, document handling restrictions, and application control policies.
  • Verify remediation by checking installed Office versions against Microsoft’s published fixed boundaries and your standard vulnerability management process.

Evidence notes

This debrief is based only on the provided NVD metadata and the linked Microsoft MSRC advisory reference. The source corpus supplies the vulnerability description, CVSS vector and score, weakness mappings, publication/modification timestamps, and NVD CPE criteria. It does not include the full vendor bulletin text, so applicability should be validated against the official Microsoft advisory before taking action.

Official resources

Publicly disclosed on 2025-08-12 and modified on 2025-08-15, per the provided CVE and source timestamps.