{"id":"CVE-2026-93952","published":"2026-09-22T08:16:43Z","modified":"2026-09-23T14:32:12Z","title":"Arista VeloCloud Orchestrator Improper Input Validation Vulnerability","vendor":"Arista","product":"VeloCloud Orchestrator","tier":"core","eol":null,"description":{"text":"VeloCloud Orchestrator (VCO) on-prem has a security issue where this issue may allow a remote attacker to access privileged internal functionality and impact the VCO host. Successful exploitation may compromise the confidentiality, integrity, and availability of the orchestrator and data managed by the orchestrator.\n\nHosted, including Dedicated, versions of VCO were impacted and have already been patched.","provenance":"source","from":"NVD"},"summary":{"text":"Arista's VeloCloud Orchestrator (VCO) has an improper input validation flaw in its on-prem deployment. An unauthenticated remote attacker over the network, requiring no user interaction and no special configuration, can access privileged internal functionality and impact the VCO host, potentially compromising the confidentiality, integrity, and availability of the orchestrator and the data it manages.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:14:40Z"},"cvss":{"score":10.0,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.01384,"percentile":0.72172,"date":"2026-10-30","provenance":"source"},"kev":{"dateAdded":"2026-09-22","dueDate":"2026-09-25","ransomware":false,"requiredAction":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","notes":"https://www.arista.com/en/support/advisories-notices/security-advisory/24765-security-advisory-0183 ; ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-93952","provenance":"source"},"vulncheckKev":{"dateAdded":"2026-09-22","exploitedFirstSeen":"2026-09-22","ransomware":false,"evidence":[{"url":"https://www.arista.com/en/support/advisories-notices/security-advisory/24765-security-advisory-0183","date":"2026-09-22"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2026-09-22"}],"evidenceTotal":2,"provenance":"source"},"exploited":true,"otx":{"pulseCount":39,"pulses":[{"name":"Actively_Exploited_Kev | Oct 31, 2026","url":"https://otx.alienvault.com/pulse/6ae4aefab0c2191cecd41862","created":"2026-10-30"},{"name":"Actively_Exploited_Kev | Oct 30, 2026","url":"https://otx.alienvault.com/pulse/6ae35d889ea92b4ce19c2680","created":"2026-10-29"},{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Arista patches new VeloCloud Orchestrator zero-day exploited in attacks","url":"https://otx.alienvault.com/pulse/6ada4e1c2502752ddf07131a","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"}],"provenance":"machine"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"references":[{"url":"https://www.arista.com/en/support/advisories-notices/security-advisory/24765-security-advisory-0183","tags":["Mitigation","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-93952","tags":["US Government Resource"]}],"techniques":[{"id":"T1190","name":"Exploit Public-Facing Application","tactics":["initial-access"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Remote unauthenticated access to exposed orchestrator application","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"a remote attacker to access privileged internal functionality","start":85,"end":146}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1068","name":"Exploitation for Privilege Escalation","tactics":["privilege-escalation"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Access to privileged internal functions implies privilege escalation","mappingType":"primary_impact","evidence":[{"from":"description","quote":"may allow a remote attacker to access privileged internal functionality","start":75,"end":146}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2026-84296","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-84296","exploited":true,"exploitedSince":"2026-09-22","provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"ai"},{"stage":"primary","techniques":["T1068"],"provenance":"ai"}],"timeline":[{"date":"2026-09-22","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93952","provenance":"source"},{"date":"2026-09-22","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://www.arista.com/en/support/advisories-notices/security-advisory/24765-security-advisory-0183","provenance":"source"},{"date":"2026-09-22","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2026-09-22","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-84296","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":0},"priority":{"score":69.4,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":10.0,"detail":"added 39 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":14.43,"detail":"percentile 0.7217"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":0.0,"detail":"none found"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"39 pulses"},{"name":"CVSS severity","points":7.0,"detail":"base score 10.0"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}