{"id":"CVE-2020-7540","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-7540","generatedAt":"2026-10-27T22:24:23.230Z","title":"A CWE-306: Missing Authentication for Critical Function vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions),…","description":"A CWE-306: Missing Authentication for Critical Function vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause unauthenticated command execution in the controller when sending special HTTP requests.","published":"2020-12-11T01:15:12.000Z","lastModified":"2026-06-17T03:24:58.000Z","status":"Modified","sourceIdentifier":"cybersecurity@se.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-306"],"affected":["schneider-electric/modicon m340 bmxp341000 firmware","schneider-electric/modicon m340 bmxp342000 firmware","schneider-electric/modicon m340 bmxp3420102 firmware","schneider-electric/modicon m340 bmxp3420102cl firmware","schneider-electric/modicon m340 bmxp342020 firmware","schneider-electric/modicon m340 bmxp3420302 firmware","schneider-electric/modicon m340 bmxp3420302cl firmware","schneider-electric/bmxnoe0100 firmware","schneider-electric/bmxnoe0110 firmware","schneider-electric/140noe77101 firmware","schneider-electric/140noe77111 firmware","schneider-electric/140cpu65150 firmware","schneider-electric/140cpu65160 firmware","schneider-electric/140noc78000 firmware","schneider-electric/140noc78100 firmware","schneider-electric/140noc77101 firmware","schneider-electric/tsxp574634 firmware","schneider-electric/tsxp575634 firmware","schneider-electric/tsxp576634 firmware","schneider-electric/tsxety4103 firmware","schneider-electric/tsxety5103 firmware","schneider-electric/bmxnoc0401 firmware","schneider-electric/bmxnor200h firmware"],"epss":{"score":0.02317,"percentile":0.83317,"date":"2026-10-26","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 (2.32%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://www.se.com/ww/en/download/document/SEVD-2020-343-04/","tags":["Vendor Advisory"],"source":"cybersecurity@se.com"},{"url":"https://www.se.com/ww/en/download/document/SEVD-2020-343-04/","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-7540","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."}