CVE-2025-49703
Published: 08 July 2025
Summary
CVE-2025-49703 is a high-severity Use After Free (CWE-416) vulnerability in Microsoft Office Long Term Servicing Channel. Its CVSS base score is 7.8 (High).
Operationally, ranked in the top 21.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2025-49703 is a use-after-free vulnerability, tracked under CWE-416, that affects Microsoft Office Word. The flaw carries a CVSS 3.1 base score of 7.8 and permits an attacker to execute arbitrary code on an affected system.
An unauthorized attacker can trigger the issue locally by convincing a user to open a malicious document, resulting in full compromise of confidentiality, integrity, and availability without requiring elevated privileges. The EPSS score remains low, with a current value of 0.0108 and a peak of 0.0111, indicating limited observed exploitation interest to date.
The Microsoft Security Response Center advisory at the referenced URL provides official guidance on available patches and mitigation steps for the affected Word installations.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-20555
Vulnerability details
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Use-after-free exploits that achieve arbitrary code execution are blocked or significantly hardened by non-executable pages and ASLR.