CVE-2022-40267

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.

• CWE-337
• CWE-335

• https://jvn.jp/vu/JVNVU99673580/index.htmlMitigation, Third Party Advisory
• https://www.cisa.gov/uscert/ics/advisories/icsa-23-017-02Mitigation, Third Party Advisory, US Government Resource
• https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-019_en.pdfMitigation, Vendor Advisory
• https://jvn.jp/vu/JVNVU99673580/index.htmlMitigation, Third Party Advisory
• https://www.cisa.gov/uscert/ics/advisories/icsa-23-017-02Mitigation, Third Party Advisory, US Government Resource
• https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-019_en.pdfMitigation, Vendor Advisory
• https://www.talosintelligence.com/vulnerability_reports/TALOS-2022-1646

Published

Jan 20, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2022-40261An attacker can exploit this vulnerability to elevate privil…8.2
• CVE-2022-40262A potential attacker can execute an arbitrary code at the ti…8.2
• CVE-2022-40263BD Totalys MultiProcessor, versions 1.70 and earlier, contai…7.8
• CVE-2022-40264Improper Limitation of a Pathname to a Restricted Directory …7.1
• CVE-2022-40265Improper Input Validation vulnerability in Mitsubishi Electr…7.5
• CVE-2022-40266Improper Input Validation vulnerability in Mitsubishi Electr…6.5
• CVE-2022-40268Improper Restriction of Rendered UI Layers or Frames vulnera…4.7
• CVE-2022-40269Authentication Bypass by Spoofing vulnerability in Mitsubish…8.1
• CVE-2022-4027The Simple:Press plugin for WordPress is vulnerable to Store…5.4
• CVE-2022-40270Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
• CVE-2022-40271Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
• CVE-2022-40272Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…