CVE-2025-29840
Published: 13 May 2025
Summary
CVE-2025-29840 is a high-severity Stack-based Buffer Overflow (CWE-121) vulnerability in Microsoft Windows 10 21H2. Its CVSS base score is 8.8 (High).
Operationally, ranked in the top 18.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
The vulnerability CVE-2025-29840 is a stack-based buffer overflow, tracked under CWE-121 and CWE-787, that affects the Windows Media component. It carries a CVSS 3.1 base score of 8.8 and was published on 13 May 2025.
An unauthorized attacker can exploit the flaw over a network to achieve remote code execution. The attack vector requires no privileges and only limited user interaction, resulting in high impact to confidentiality, integrity, and availability.
The Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29840 supplies official patch information and mitigation guidance for affected Windows installations.
EPSS remains flat at 0.0149 with no material rise observed after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-14425
Vulnerability details
Stack-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.