CVE-2025-29963
Published: 13 May 2025
Summary
CVE-2025-29963 is a high-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Microsoft Windows 10 21H2. Its CVSS base score is 8.8 (High).
Operationally, ranked in the top 15.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
A heap-based buffer overflow vulnerability, tracked as CVE-2025-29963 and assigned CWE-122 and CWE-787, affects the Windows Media component. It carries a CVSS 3.1 score of 8.8 reflecting network attack vector, low attack complexity, no required privileges, and required user interaction, with high impact on confidentiality, integrity, and availability.
An unauthorized remote attacker can exploit the flaw over a network to execute arbitrary code on the target system. The attack does not require authentication and succeeds when a user interacts with attacker-controlled media content.
Microsoft has published an advisory describing the issue and available updates at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29963. The associated EPSS score remains flat at 0.02 with no observed rise after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-14415
Vulnerability details
Heap-based buffer overflow in Windows Media allows an unauthorized attacker to execute code over a network.
- 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.
Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.