{"id":"CVE-2023-27389","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-27389","generatedAt":"2026-10-24T22:04:33.706Z","title":"Inadequate encryption strength vulnerability in CONPROSYS IoT Gateway products allows a remote authenticated attacker with an administrative privilege to apply a specially crafted Firmware update file, alter the information, cause a denial-of-service…","description":"Inadequate encryption strength vulnerability in CONPROSYS IoT Gateway products allows a remote authenticated attacker with an administrative privilege to apply a specially crafted Firmware update file, alter the information, cause a denial-of-service (DoS) condition, and/or execute arbitrary code. The affected products and versions are as follows: M2M Gateway with the firmware Ver.3.7.10 and earlier (CPS-MG341-ADSC1-111, CPS-MG341-ADSC1-931, CPS-MG341G-ADSC1-111, CPS-MG341G-ADSC1-930, and CPS-MG341G5-ADSC1-931), M2M Controller Integrated Type with firmware Ver.3.7.6 and earlier versions (CPS-MC341-ADSC1-111, CPS-MC341-ADSC1-931, CPS-MC341-ADSC2-111, CPS-MC341G-ADSC1-110, CPS-MC341Q-ADSC1-111, CPS-MC341-DS1-111, CPS-MC341-DS11-111, CPS-MC341-DS2-911, and CPS-MC341-A1-111), and M2M Controller Configurable Type with firmware Ver.3.8.8 and earlier versions (CPS-MCS341-DS1-111, CPS-MCS341-DS1-131, CPS-MCS341G-DS1-130, CPS-MCS341G5-DS1-130, and CPS-MCS341Q-DS1-131).","published":"2023-04-11T09:15:08.000Z","lastModified":"2026-06-17T05:44:56.000Z","status":"Modified","sourceIdentifier":"vultures@jpcert.or.jp","cvss":{"version":"3.1","score":7.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-326"],"affected":["contec/cps-mg341-adsc1-111 firmware","contec/cps-mg341-adsc1-931 firmware","contec/cps-mg341g-adsc1-111 firmware","contec/cps-mg341g-adsc1-930 firmware","contec/cps-mg341g5-adsc1-931 firmware","contec/cps-mc341-adsc1-111 firmware","contec/cps-mc341-adsc1-931 firmware","contec/cps-mc341-adsc2-111 firmware","contec/cps-mc341g-adsc1-110 firmware","contec/cps-mc341q-adsc1-111 firmware","contec/cps-mc341-ds1-111 firmware","contec/cps-mc341-ds11-111 firmware","contec/cps-mc341-ds2-911 firmware","contec/cps-mc341-a1-111 firmware","contec/cps-mcs341-ds1-111 firmware","contec/cps-mcs341-ds1-131 firmware","contec/cps-mcs341g-ds1-130 firmware","contec/cps-mcs341g5-ds1-130 firmware","contec/cps-mcs341q-ds1-131 firmware"],"epss":{"score":0.00523,"percentile":0.43593,"date":"2026-10-23","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.52%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://jvn.jp/en/vu/JVNVU96198617/","tags":["Third Party Advisory"],"source":"vultures@jpcert.or.jp"},{"url":"https://www.contec.com/api/downloadlogger?download=/-/media/Contec/jp/support/security-info/contec_security_cps_230317_en.pdf","tags":["Mitigation","Vendor Advisory"],"source":"vultures@jpcert.or.jp"},{"url":"https://www.contec.com/download/donwload-list/?itemid=a054b3eb-da97-40d0-9598-d7f5ff4239ec#firmware","tags":["Product"],"source":"vultures@jpcert.or.jp"},{"url":"https://www.contec.com/download/donwload-list/?itemid=a1b33f0d-d32b-4549-9741-613cd37d5528#firmware","tags":["Product"],"source":"vultures@jpcert.or.jp"},{"url":"https://www.contec.com/download/donwload-list/?itemid=f832c526-dcf6-4976-85aa-f536c15a8120#firmware","tags":["Product"],"source":"vultures@jpcert.or.jp"},{"url":"https://jvn.jp/en/vu/JVNVU96198617/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.contec.com/api/downloadlogger?download=/-/media/Contec/jp/support/security-info/contec_security_cps_230317_en.pdf","tags":["Mitigation","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.contec.com/download/donwload-list/?itemid=a054b3eb-da97-40d0-9598-d7f5ff4239ec#firmware","tags":["Product"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.contec.com/download/donwload-list/?itemid=a1b33f0d-d32b-4549-9741-613cd37d5528#firmware","tags":["Product"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.contec.com/download/donwload-list/?itemid=f832c526-dcf6-4976-85aa-f536c15a8120#firmware","tags":["Product"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-27389","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}