Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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-2023-3346 is a critical-severity Classic Buffer Overflow (CWE-120) vulnerability in Mitsubishielectric C80 Firmware. Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique NTDS (T1003.003); ranked in the top 19% 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-2023-3346 is a classic buffer overflow vulnerability (CWE-120) affecting Mitsubishi CNC Series products. The flaw permits a remote attacker to supply specially crafted network packets that trigger uncontrolled copying of input data, leading to denial of service or arbitrary code execution; recovery requires a system reset.
An unauthenticated attacker with network access can exploit the issue without user interaction or credentials. Successful exploitation grants the ability to crash the affected device or run arbitrary code, resulting in full compromise of confidentiality, integrity, and availability as reflected in the CVSS 9.8 score.
Vendor and government advisories from Mitsubishi Electric and CISA recommend applying the patches and mitigations described in the published security bulletins, including restricting network exposure of the affected CNC controllers where feasible.
EPSS for the vulnerability rose from a low baseline after disclosure to a peak of 0.0649 on 2025-01-22 before receding to the current value of 0.0171, indicating a period of increased exploitation interest that later subsided.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-44014
Vulnerability Data
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in MITSUBSHI CNC Series allows a remote unauthenticated attacker to cause Denial of Service (DoS) condition and execute arbitrary code on the product by sending specially crafted packets. In…
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addition, system reset is required for recovery.
- 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.