What’s Vulnerable › Vulnerabilities

CVE-2023-2846: Authentication Bypass Vulnerability in MELSEC-F Series main module

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-06-30 · updated 2026-06-17
• Weakness: CWE-294

Description

Authentication Bypass by Capture-replay vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series main modules allows a remote unauthenticated attacker to cancel the password/keyword setting and login to the affected products by sending specially crafted packets.

Affected products

• Mitsubishielectric Fx3G-14Mr/Ds Firmware: all versions
• Mitsubishielectric Fx3G-14Mr/Es-A Firmware: all versions
• Mitsubishielectric Fx3G-14Mr/Es Firmware: all versions
• Mitsubishielectric Fx3G-14Mt/Ds Firmware: all versions
• Mitsubishielectric Fx3G-14Mt/Dss Firmware: all versions
• Mitsubishielectric Fx3G-14Mt/Es-A Firmware: all versions
• Mitsubishielectric Fx3G-14Mt/Es Firmware: all versions
• Mitsubishielectric Fx3G-14Mt/Ess Firmware: all versions
• Mitsubishielectric Fx3G-24Mr/Ds Firmware: all versions
• Mitsubishielectric Fx3G-24Mr/Es-A Firmware: all versions
• Mitsubishielectric Fx3G-24Mr/Es Firmware: all versions
• Mitsubishielectric Fx3G-24Mt/Ds Firmware: all versions
• Mitsubishielectric Fx3G-24Mt/Dss Firmware: all versions
• Mitsubishielectric Fx3G-24Mt/Es-A Firmware: all versions
• Mitsubishielectric Fx3G-24Mt/Es Firmware: all versions
• Mitsubishielectric Fx3G-24Mt/Ess Firmware: all versions
• Mitsubishielectric Fx3G-40Mr/Ds Firmware: all versions
• Mitsubishielectric Fx3G-40Mr/Es-A Firmware: all versions
• Mitsubishielectric Fx3G-40Mr/Es Firmware: all versions
• Mitsubishielectric Fx3G-40Mt/Ds Firmware: all versions
• Mitsubishielectric Fx3G-40Mt/Dss Firmware: all versions
• Mitsubishielectric Fx3G-40Mt/Es-A Firmware: all versions
• Mitsubishielectric Fx3G-40Mt/Es Firmware: all versions
• Mitsubishielectric Fx3G-40Mt/Ess Firmware: all versions
• Mitsubishielectric Fx3G-60Mr/Ds Firmware: all versions
• Mitsubishielectric Fx3G-60Mr/Es-A Firmware: all versions
• Mitsubishielectric Fx3G-60Mr/Es Firmware: all versions
• Mitsubishielectric Fx3G-60Mt/Ds Firmware: all versions
• Mitsubishielectric Fx3G-60Mt/Dss Firmware: all versions
• Mitsubishielectric Fx3G-60Mt/Es-A Firmware: all versions

References

• https://jvn.jp/vu/JVNVU94519952
• https://www.cisa.gov/news-events/ics-advisories/icsa-23-180-04
• https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-005_en.pdf
• https://jvn.jp/vu/JVNVU94519952
• https://www.cisa.gov/news-events/ics-advisories/icsa-23-180-04
• https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-005_en.pdf

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