{"cve":{"cve_id":"CVE-2020-6998","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.0174,"epss_percentile":0.74788,"epss_as_of":"2026-06-23","description":"The connection establishment algorithm found in Rockwell Automation CompactLogix 5370 and ControlLogix 5570 versions 33 and prior does not sufficiently manage its control flow during execution, creating an infinite loop. This may allow an attacker to send specially crafted CIP packet requests to a controller, which may cause denial-of-service conditions in communications with other products.","published_at":"2022-07-27T20:18:00Z","last_modified_at":null,"cvss_v3_score":5.8,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L","cvss_v3_severity":"MEDIUM","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"none","ssvc_automatable":true,"ssvc_technical_impact":"partial","cwes":["CWE-20"],"nvd_references":["https://www.cisa.gov/uscert/ics/advisories/icsa-21-061-02","https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1130398"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:14:31.139277Z"},"effective_severity":"MEDIUM","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack 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prior"},{"vendor_slug":"rockwell-automation","vendor_name":"Rockwell Automation","product_slug":"compactlogix-5370-l1-controllers","product_name":"CompactLogix 5370 L1 controllers","version_start":"unspecified","version_start_inclusive":true,"version_end":"versions 33 and prior","version_end_inclusive":true,"cpe23_uri":"cve5:rockwell-automation:compactlogix-5370-l1-controllers:unspecified:versions 33 and prior"},{"vendor_slug":"rockwell-automation","vendor_name":"Rockwell Automation","product_slug":"compactlogix-5370-l2-controllers","product_name":"CompactLogix 5370 L2 controllers","version_start":"unspecified","version_start_inclusive":true,"version_end":"versions 33 and prior","version_end_inclusive":true,"cpe23_uri":"cve5:rockwell-automation:compactlogix-5370-l2-controllers:unspecified:versions 33 and prior"},{"vendor_slug":"rockwell-automation","vendor_name":"Rockwell Automation","product_slug":"compactlogix-5370-l3-controllers","product_name":"CompactLogix 5370 L3 controllers","version_start":"unspecified","version_start_inclusive":true,"version_end":"versions 33 and prior","version_end_inclusive":true,"cpe23_uri":"cve5:rockwell-automation:compactlogix-5370-l3-controllers:unspecified:versions 33 and prior"},{"vendor_slug":"rockwell-automation","vendor_name":"Rockwell Automation","product_slug":"controllogix-5570-controllers","product_name":"ControlLogix 5570 controllers","version_start":"unspecified","version_start_inclusive":true,"version_end":"versions 33 and prior","version_end_inclusive":true,"cpe23_uri":"cve5:rockwell-automation:controllogix-5570-controllers:unspecified:versions 33 and prior"}],"exploit_refs":[],"news":[],"references":[{"url":"https://www.cisa.gov/uscert/ics/advisories/icsa-21-061-02","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1130398","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2022-07-27T20:18:00Z","label":"CVE published","source":null},{"type":"ssvc_changed","at":"2026-06-24T00:31:35.223313Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:35.223313Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:35.223313Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:35.223313Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:35.223313Z","label":"CVSS score 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