{“lastseen”:””,”description”:”A vulnerability exists in the command handling of the IEC 61850 communication stack included in the product revisions listed as affected in this CVE. An attacker with access to IEC 61850 networks could exploit the vulnera bility by using a specially crafted 61850 packet, forcing the communication interfaces of the PM 877, CI850 and CI868 modules into fault mode or causing unavailability of the S+ Operations 61850 connectivity, resulting in a denial-of-service situation.\u00a0\\n\\n\\n\\n\\nThe System 800xA IEC61850 Connect is not affected. Note: This vulnerability does not impact on the overall availability and functionality of the S+ Operations node, only the 61850 communication function.\\n\\n\u00a0 \u00a0\\n\\n\\n\\nThis issue affects AC800M (System 800xA):\u00a0from 6.0.0x through 6.0.0303.0, from 6.1.0x through 6.1.0031.0, from 6.1.1x through 6.1.1004.0, from 6.1.1x through 6.1.1202.0, from 6.2.0x through 6.2.0006.0; Symphony Plus SD Series: A_0, A_1, A_2.003, A_3.005, A_4.001, B_0.005; Symphony Plus MR (Melody Rack): from 3.10 through 3.52; S+ Operations: 2.1, 2.2, 2.3, 3.3.”,”published”:”2026-04-13T17:11:08.412Z”,”modified”:”2026-04-13T17:11:08.412Z”,”type”:”cve”,”title”:”Denial of Service Vulnerabilities in System 800xA, Symphony\u00ae Plus IEC 61850″,”source”:”ABB”,”references”:”https:\/\/search.abb.com\/library\/Download.aspx?DocumentID=7PAA020125\\u0026LanguageCode=en\\u0026DocumentPartId=\\u0026Action=Launch”,”id”:”CVE-2025-3756″,”bulletinFamily”:””,”cwe”:[“CWE-1284″],”cvelist”:null,”sourceData”:”ABB AC800M (System 800xA) 6.0.0x\\nABB AC800M (System 800xA) 6.1.0x\\nABB AC800M (System 800xA) 6.1.1x\\nABB AC800M (System 800xA) 6.1.1x\\nABB AC800M (System 800xA) 6.2.0x\\nABB Symphony Plus SD Series A_0\\nABB Symphony Plus SD Series A_1\\nABB Symphony Plus SD Series A_2.003\\nABB Symphony Plus SD Series A_3.005\\nABB Symphony Plus SD Series A_4.001\\nABB Symphony Plus SD Series B_0.005\\nABB Symphony Plus MR (Melody Rack) 3.10\\nABB S+ Operations 2.1\\nABB S+ Operations 2.2\\nABB S+ Operations 2.3\\nABB S+ Operations 3.3″,”sourceHref”:””,”cvss”:{“score”:7.1,”severity”:”HIGH”,”vector”:”CVSS:4.0\/AV:A\/AC:L\/AT:N\/PR:N\/UI:N\/VC:N\/VI:N\/VA:H\/SC:N\/SI:N\/SA:N”,”version”:”4.0″},”cvss2″:{},”cvss3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””,”cvssV3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””}},”href”:””,”category_name”:”CVE”,”post_link”:””,”product”:”AC800M (System 800xA)”,”version”:”6.0.0x”,”vendor”:”ABB”,”ai_description”:””,”ai_severity”:””,”ai_vendor”:””,”ai_product”:””,”ai_version”:””,”ai_score”:0}<\/p>\n","protected":false},"excerpt":{"rendered":"
{“lastseen”:””,”description”:”A vulnerability exists in the command handling of the IEC 61850 communication stack included in the product revisions listed as affected in this CVE. An…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[6,8,50,12,15,13,7,11,5],"class_list":["post-46330","post","type-post","status-publish","format-standard","hentry","category-category_cve","tag-cve","tag-cvss","tag-cvss-71","tag-exploit","tag-high","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"\n