CVE-2024-20039
Published: 01 April 2024
Summary
CVE-2024-20039 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Mediatek Lr12A. Its CVSS base score is 8.8 (High).
Operationally, ranked in the top 13.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2024-20039 is an out-of-bounds write vulnerability caused by a missing bounds check in the modem protocol. The flaw is tracked under CWE-787 and carries a CVSS 3.1 score of 8.8. It affects MediaTek modem implementations, with the vendor assigning Patch ID MOLY01240012 and Issue ID MSV-1215.
An attacker with network access and low privileges can trigger the flaw remotely without user interaction, resulting in remote code execution that grants full control over confidentiality, integrity, and availability of the affected device.
MediaTek’s April 2024 product security bulletin lists the issue and directs customers to apply the referenced patch. The EPSS score rose from a low baseline to a peak of 0.0544 on 2025-12-11 before receding, indicating that exploitation interest increased after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-17754
Vulnerability details
In modem protocol, there is a possible out of bounds write due to a missing bounds check. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01240012;…
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Issue ID: MSV-1215.
- 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.