Vulnerability in Mitsubishielectric Fx5s-30mr\/es
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.012 (67.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000
Affected products
- Mitsubishielectric Fx5s-30mr\/es
- Mitsubishielectric Fx5s-30mr\/es Firmware
- Mitsubishielectric Fx5s-30mt\/es
- Mitsubishielectric Fx5s-30mt\/es Firmware
- Mitsubishielectric Fx5s-30mt\/ess
- Mitsubishielectric Fx5s-30mt\/ess Firmware
- Mitsubishielectric Fx5s-40mr\/es
- Mitsubishielectric Fx5s-40mr\/es Firmware
- Mitsubishielectric Fx5s-40mt\/es
- Mitsubishielectric Fx5s-40mt\/es Firmware
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-019_en.pdf (Mitigation, Vendor Advisory)
- jvn.jp/vu/JVNVU99673580/index.html (Third Party Advisory, Mitigation)
- www.cisa.gov/uscert/ics/advisories/icsa-23-017-02 (US Government Resource, Third Party Advisory, Mitigation)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2022-40267?
- CVE-2022-40267 is a medium-severity vulnerability in Mitsubishielectric Fx5s-30mr\/es, classified under CWE-337. CVSS score: 5.9/10. Published 2023-01-20.
- How severe is CVE-2022-40267?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2022-40267 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.