Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2023-1424 is a critical-severity Classic Buffer Overflow (CWE-120) vulnerability in Mitsubishielectric Melsec Iq-Fx5U-32Mr\/Ds Firmware. Its CVSS base score is 10.0 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique NTDS (T1003.003); ranked in the top 11% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2023-1424 is a classic buffer overflow vulnerability (CWE-120) affecting Mitsubishi Electric MELSEC iQ-F Series and MELSEC iQ-R Series CPU modules. The flaw permits a remote attacker to send specially crafted packets that trigger memory corruption, leading to either a denial-of-service condition or arbitrary code execution on the target device. Recovery from a DoS state requires a manual system reset of the affected module.
An unauthenticated attacker with network access can exploit the issue without user interaction or credentials, achieving either persistent disruption or full control over the PLC. The vulnerability carries a CVSS 3.1 base score of 10.0, reflecting its network-exposable nature and the high impact on confidentiality, integrity, and availability within an industrial control system context.
Vendor and government advisories, including Mitsubishi Electric’s security bulletin 2023-003 and CISA ICSA-23-143-03, provide mitigation guidance and are available at the referenced URLs. The EPSS score rose from a low baseline to a peak of 0.0500 on 2025-01-22 before receding to its current value of 0.0276, indicating a measurable increase in observed exploitation interest well after initial disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-23677
Vulnerability Data
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series CPU modules and MELSEC iQ-R Series CPU modules allows a remote unauthenticated attacker to cause a denial of service (DoS) condition or…
more
execute malicious code on a target product by sending specially crafted packets. A system reset of the product is required for recovery from a denial of service (DoS) condition and malicious code execution.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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V5.2.1
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.
Platform-independent managed code eliminates the need for unchecked native buffer copies that are the root cause of classic buffer overflows.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Vulnerability identification processes such as code review or scanning detect classic buffer overflows before exploitation.
Routine patching replaces vulnerable code containing unchecked buffer copies with corrected versions.
Secure development practices directly enforce bounds checking and input validation that prevent classic buffer overflows.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.