{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2020-8475", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2020-8475", "idYear": 2020, "status": "PUBLISHED", "publishedAt": "2020-04-29T00:00:00.000Z", "updatedAt": "2024-08-04T10:03:44.814Z", "importedAt": "2026-10-24T01:56:21.187Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "ABB Central Licensing System - Denial of Service Vulnerability", "summary": "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 block license handling by sending specially crafted messages to the CLS web service.", "affected": [ { "vendor": "ABB", "product": "Central Licensing System", "versions": [ { "version": "5.1", "status": "affected", "versionType": "custom", "lessThan": "5*" } ] }, { "vendor": "ABB", "product": "ABB Ability System 800xA", "versions": [ { "version": "5.1", "status": "affected" }, { "version": "6.0", "status": "affected" }, { "version": "6.1", "status": "affected" } ] }, { "vendor": "ABB", "product": "Compact HMI", "versions": [ { "version": "5.1", "status": "affected" }, { "version": "6.0", "status": "affected" } ] }, { "vendor": "ABB", "product": "Control Builder Safe", "versions": [ { "version": "1.0", "status": "affected" }, { "version": "1.1", "status": "affected" }, { "version": "2.0", "status": "affected" } ] }, { "vendor": "ABB", "product": "Symphony Plus S+ Operations", "versions": [ { "version": "3", "status": "affected", "versionType": "custom", "lessThanOrEqual": "3.2" } ] }, { "vendor": "ABB", "product": "Symphony Plus S+ Engineering", "versions": [ { "version": "1.1", "status": "affected", "versionType": "custom", "lessThanOrEqual": "2.2" } ] }, { "vendor": "ABB", "product": "Composer Harmony", "versions": [ { "version": "5.1", "status": "affected" }, { "version": "6.0", "status": "affected" }, { "version": "6.1", "status": "affected" } ] }, { "vendor": "ABB", "product": "Composer Melody", "versions": [ { "version": "5.3", "status": "affected" }, { "version": "6", "status": "affected", "versionType": "custom", "lessThanOrEqual": "6.3" } ] }, { "vendor": "ABB", "product": "Harmony OPC Server Standalone", "versions": [ { "version": "6.0", "status": "affected" }, { "version": "6.1", "status": "affected" }, { "version": "7.0", "status": "affected" } ] }, { "vendor": "ABB", "product": "Advant OCS Control Builder A", "versions": [ { "version": "1.3", "status": "affected" }, { "version": "1.4", "status": "affected" } ] }, { "vendor": "ABB", "product": "Composer CTK", "versions": [ { "version": "6.1", "status": "affected" }, { "version": "6.2", "status": "affected" } ] }, { "vendor": "ABB", "product": "AdvaBuild", "versions": [ { "version": "3.7 SP1", "status": "affected" }, { "version": "3.7 SP2", "status": "affected" } ] }, { "vendor": "ABB", "product": "OPC Server for Mod 300 (non-800xA)", "versions": [ { "version": "1.4", "status": "affected" } ] }, { "vendor": "ABB", "product": "OPC Data Link", "versions": [ { "version": "2.1", "status": "affected" }, { "version": "2.2", "status": "affected" } ] }, { "vendor": "ABB", "product": "Knowledge Manager", "versions": [ { "version": "8.0", "status": "affected" }, { "version": "9.0", "status": "affected" }, { "version": "9.1", "status": "affected" } ] }, { "vendor": "ABB", "product": "Manufacturing Operations Management", "versions": [ { "version": "1812", "status": "affected" }, { "version": "1909", "status": "affected" } ] }, { "vendor": "ABB", "product": "Advant OCS AC 100 OPS Server", "versions": [ { "version": "5.1", "status": "affected" }, { "version": "6.0", "status": "affected" }, { "version": "6.1", "status": "affected" } ] }, { "vendor": "ABB", "product": "ABB Ability™ SCADAvantage", "versions": [ { "version": "5.1", "status": "affected", "versionType": "custom", "lessThan": "unspecified" }, { "version": "unspecified", "status": "affected", "versionType": "custom", "lessThanOrEqual": "5.6.5" } ] } ] } } }