{"id":"CVE-2020-8476","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-8476","generatedAt":"2026-10-28T01:51:13.936Z","title":"For the Central Licensing Server component used in ABB products ABB Ability™ System 800xA and related system extensions versions 5.1, 6.0 and 6.1, Compact HMI versions 5.1 and 6.0, Control Builder Safe 1.0, 1.1 and 2.0, Symphony Plus -S+ Operations 3.0…","description":"For the Central Licensing Server component used in ABB products ABB Ability™ System 800xA and related system extensions versions 5.1, 6.0 and 6.1, Compact HMI versions 5.1 and 6.0, Control Builder Safe 1.0, 1.1 and 2.0, Symphony Plus -S+ Operations 3.0 to 3.2 Symphony Plus -S+ Engineering 1.1 to 2.2, Composer Harmony 5.1, 6.0 and 6.1, Melody Composer 5.3, 6.1/6.2 and SPE for Melody 1.0SPx (Composer 6.3), Harmony OPC Server (HAOPC) Standalone 6.0, 6.1 and 7.0, ABB Ability™ System 800xA/ Advant® OCS Control Builder A 1.3 and 1.4, Advant® OCS AC100 OPC Server 5.1, 6.0 and 6.1, Composer CTK 6.1 and 6.2, AdvaBuild 3.7 SP1 and SP2, OPCServer for MOD 300 (non-800xA) 1.4, OPC Data Link 2.1 and 2.2, Knowledge Manager 8.0, 9.0 and 9.1, Manufacturing Operations Management 1812 and 1909, ABB AbilityTM SCADAvantage versions 5.1 to 5.6.5, a weakness in validation of input exists that allows an attacker to alter licenses assigned to the system nodes by sending specially crafted messages to the CLS web service.","published":"2020-04-29T02:15:12.000Z","lastModified":"2026-06-17T03:26:26.000Z","status":"Modified","sourceIdentifier":"cybersecurity@ch.abb.com","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},"cwe":["CWE-20"],"affected":["abb/800xa system","abb/compact hmi","abb/control builder safe"],"epss":{"score":0.01548,"percentile":0.74869,"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 (1.55%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://search.abb.com/library/Download.aspx?DocumentID=2PAA121230&LanguageCode=en&DocumentPartId=&Action=Launch","tags":["Vendor Advisory"],"source":"cybersecurity@ch.abb.com"},{"url":"https://search.abb.com/library/Download.aspx?DocumentID=2PAA121231&LanguageCode=en&DocumentPartId=&Action=Launch","tags":["Vendor Advisory"],"source":"cybersecurity@ch.abb.com"},{"url":"https://search.abb.com/library/Download.aspx?DocumentID=3CCA2020-003309&LanguageCode=en&DocumentPartId=&Action=Launch","source":"cybersecurity@ch.abb.com"},{"url":"https://search.abb.com/library/Download.aspx?DocumentID=2PAA121230&LanguageCode=en&DocumentPartId=&Action=Launch","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://search.abb.com/library/Download.aspx?DocumentID=2PAA121231&LanguageCode=en&DocumentPartId=&Action=Launch","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://search.abb.com/library/Download.aspx?DocumentID=3CCA2020-003309&LanguageCode=en&DocumentPartId=&Action=Launch","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-8476","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."}