{"id":"CVE-2021-22745","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-22745","generatedAt":"2026-10-27T22:31:42.811Z","title":"Improper Check for Unusual or Exceptional Conditions vulnerability exists in Triconex Model 3009 MP installed on Tricon V11.3.x systems that could cause module reset when TCM receives malformed TriStation packets while the write-protect keyswitch is in…","description":"Improper Check for Unusual or Exceptional Conditions vulnerability exists in Triconex Model 3009 MP installed on Tricon V11.3.x systems that could cause module reset when TCM receives malformed TriStation packets while the write-protect keyswitch is in the program position. This CVE ID is unique from CVE-2021-22742, CVE-2021-22744, CVE-2021-22746, and CVE-2021-22747.","published":"2021-05-26T20:15:09.000Z","lastModified":"2026-06-17T03:37:42.000Z","status":"Modified","sourceIdentifier":"cybersecurity@se.com","cvss":{"version":"3.1","score":3.9,"severity":"LOW","vector":"CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-754"],"affected":["schneider-electric/triconex model 3009 mp firmware","schneider-electric/tcm 4351b firmware"],"epss":{"score":0.00246,"percentile":0.1567,"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":"low","text":"Lower severity and a low EPSS score (0.25%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-130-03","tags":["Vendor Advisory"],"source":"cybersecurity@se.com"},{"url":"https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-130-03","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-22745","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."}