CVE-2024-0803
CWE-190Published: March 15, 2024· Updated: Jun 17, 2026
Official Description
Integer Overflow or Wraparound vulnerability in Mitsubishi Electric Corporation MELSEC-Q Series and MELSEC-L Series CPU modules allows a remote unauthenticated attacker to execute malicious code on a target product by sending a specially crafted packet.
Risk Analysis
This integer overflow vulnerability in Mitsubishi Electric MELSEC-Q and MELSEC-L series CPU modules allows remote, unauthenticated attackers to execute malicious code. The CVSS score of 9.8 highlights the critical nature of this flaw.
No public exploit is known, and the vulnerability is not in the CISA KEV. It is remotely exploitable with low attack complexity.
Apply the latest firmware updates from Mitsubishi Electric. Implement robust network security controls to prevent unauthorized access to the affected hardware.
Technical Analysis
CVE-2024-0803 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Exploit & PoC Resources
All References (6)
Quick Facts
Related CVEs (CWE-190)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2024-0803 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts