{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2022-40267", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-40267", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2023-01-20T07:52:56.784Z", "updatedAt": "2024-08-03T12:14:39.972Z", "importedAt": "2026-10-24T01:56:45.230Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "Authentication Bypass Vulnerability in Web Server Function on MELSEC Series", "summary": "Predictable Seed in Pseudo-Random Number Generator (PRNG) vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-xMy/z (x=32,64,80, y=T,R, z=ES,DS,ESS,DSS) with serial number 17X**** or later, and versions 1.280 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-xMy/z (x=32,64,80, y=T,R, z=ES,DS,ESS,DSS) with serial number 179**** and prior, and versions 1.074 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-xMy/z (x=32,64,96, y=T, z=D,DSS)) with serial number 17X**** or later, and versions 1.280 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-xMy/z (x=32,64,96, y=T, z=D,DSS)) with serial number 179**** and prior, and versions 1.074 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DS-TS versions 1.280 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DSS-TS versions 1.280 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-xMy/z (x=24,40,60, y=T,R, z=ES,ESS) versions 1.042 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-xMy/ES-A (x=24,40,60, y=T,R) versions 1.043 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-xMy/z (x=30,40,60,80, y=T,R, z=ES,ESS) versions 1.003 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MR/DS-TS versions 1.280 and prior, Mitsubishi Electric Corporation MELSEC iQ-R Series R00/01/02CPU versions 33 and prior, Mitsubishi Electric Corporation MELSEC iQ-R Series R04/08/16/32/120(EN)CPU versions 66 and prior allows a remote unauthenticated attacker to access the Web server function by guessing the random numbers used for authentication from several used random numbers.", "affected": [ { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5U-32MT/ES", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5U-64MT/ES", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Seres FX5U-80MT/ES", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5U-32MR/ES", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5U-64MR/ES", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5U-80MR/ES", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5U-32MT/DS", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5U-64MT/DS", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5U-80MT/DS", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5U-32MR/DS", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5U-64MR/DS", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5U-80MR/DS", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5U-32MT/ESS", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5U-64MT/ESS", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5U-80MT/ESS", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5U-32MT/DSS", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5U-64MT/DSS", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5U-80MT/DSS", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UC-32MT/D", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UC-64MT/D", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UC-96MT/D", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UC-32MT/DSS", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UC-64MT/DSS", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UC-96MT/DSS", "defaultStatus": "unaffected", "versions": [ { "version": "serial number 17X**** or later, and versions 1.280 and prior", "status": "affected" }, { "version": "serial number 179**** and prior, and versions 1.074 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UC-32MT/DS-TS", "defaultStatus": "unaffected", "versions": [ { "version": "versions 1.280 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UC-32MT/DSS-TS", "defaultStatus": "unaffected", "versions": [ { "version": "versions 1.280 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UC-32MR/DS-TS", "defaultStatus": "unaffected", "versions": [ { "version": "versions 1.280 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-R Series R00CPU", "defaultStatus": "unaffected", "versions": [ { "version": "versions 33 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-R Series R01CPU", "defaultStatus": "unaffected", "versions": [ { "version": "versions 33 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-R Series R02CPU", "defaultStatus": "unaffected", "versions": [ { "version": "versions 33 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-R Series R04CPU", "defaultStatus": "unaffected", "versions": [ { "version": "versions 66 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-R Series R08CPU", "defaultStatus": "unaffected", "versions": [ { "version": "versions 66 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-R Series R16CPU", "defaultStatus": "unaffected", "versions": [ { "version": "versions 66 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-R Series R32CPU", "defaultStatus": "unaffected", "versions": [ { "version": "versions 66 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-R Series R120CPU", "defaultStatus": "unaffected", "versions": [ { "version": "versions 66 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-R Series R04ENCPU", "defaultStatus": "unaffected", "versions": [ { "version": "versions 66 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-R Series R08ENCPU", "defaultStatus": "unaffected", "versions": [ { "version": "versions 66 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-R Series R16ENCPU", "defaultStatus": "unaffected", "versions": [ { "version": "versions 66 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-R Series R32ENCPU", "defaultStatus": "unaffected", "versions": [ { "version": "versions 66 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-R Series R120ENCPU", "defaultStatus": "unaffected", "versions": [ { "version": "versions 66 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UJ-24MT/ES", "defaultStatus": "unaffected", "versions": [ { "version": "1.042 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UJ-40MT/ES", "defaultStatus": "unaffected", "versions": [ { "version": "1.042 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UJ-60MT/ES", "defaultStatus": "unaffected", "versions": [ { "version": "1.042 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UJ-24MR/ES", "defaultStatus": "unaffected", "versions": [ { "version": "1.042 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UJ-40MR/ES", "defaultStatus": "unaffected", "versions": [ { "version": "1.042 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UJ-60MR/ES", "defaultStatus": "unaffected", "versions": [ { "version": "1.042 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UJ-24MT/ESS", "defaultStatus": "unaffected", "versions": [ { "version": "1.042 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UJ-40MT/ESS", "defaultStatus": "unaffected", "versions": [ { "version": "1.042 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UJ-60MT/ESS", "defaultStatus": "unaffected", "versions": [ { "version": "1.042 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UJ-24MT/ES-A", "defaultStatus": "unaffected", "versions": [ { "version": "1.043 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UJ-40MT/ES-A", "defaultStatus": "unaffected", "versions": [ { "version": "1.043 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UJ-60MT/ES-A", "defaultStatus": "unaffected", "versions": [ { "version": "1.043 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UJ-24MR/ES-A", "defaultStatus": "unaffected", "versions": [ { "version": "1.043 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UJ-40MR/ES-A", "defaultStatus": "unaffected", "versions": [ { "version": "1.043 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5UJ-60MR/ES-A", "defaultStatus": "unaffected", "versions": [ { "version": "1.043 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5S-30MT/ES", "defaultStatus": "unaffected", "versions": [ { "version": "1.003 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5S-40MT/ES", "defaultStatus": "unaffected", "versions": [ { "version": "1.003 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5S-60MT/ES", "defaultStatus": "unaffected", "versions": [ { "version": "1.003 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5S-80MT/ES", "defaultStatus": "unaffected", "versions": [ { "version": "1.003 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5S-30MR/ES", "defaultStatus": "unaffected", "versions": [ { "version": "1.003 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5S-40MR/ES", "defaultStatus": "unaffected", "versions": [ { "version": "1.003 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5S-60MR/ES", "defaultStatus": "unaffected", "versions": [ { "version": "1.003 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5S-80MR/ES", "defaultStatus": "unaffected", "versions": [ { "version": "1.003 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5S-30MT/ESS", "defaultStatus": "unaffected", "versions": [ { "version": "1.003 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5S-40MT/ESS", "defaultStatus": "unaffected", "versions": [ { "version": "1.003 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5S-60MT/ESS", "defaultStatus": "unaffected", "versions": [ { "version": "1.003 and prior", "status": "affected" } ] }, { "vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5S-80MT/ESS", "defaultStatus": "unaffected", "versions": [ { "version": "1.003 and prior", "status": "affected" } ] } ] } } }