In order to be vulnerable to CVE-2026-73454, the following condition must be met:
gNSI Credentialz must be enabled (Note: gNSI Credentialz is disabled by default):
\nswitch(config)#show management api gnsi\nTransport: default\nTransport enabled: yes\nServer: running on port 6030, in default VRF\n\nAcctz enabled: no\nAttestz enabled: no\nAuthz enabled: no\nCertz enabled: no\nCredentialz enabled: yes\nEnrollz enabled: no\nPathz enabled: no\n
If Credentialz is not enabled there is no exposure to this issue.
"}],"value":"In order to be vulnerable to CVE-2026-73454, the following condition must be met:\n\ngNSI Credentialz must be enabled (Note: gNSI Credentialz is disabled by default):\n\n switch(config)#show management api gnsi\n Transport: default\n Transport enabled: yes\n Server: running on port 6030, in default VRF\n\n Acctz enabled: no\n Attestz enabled: no\n Authz enabled: no\n Certz enabled: no\n Credentialz enabled: yes\n Enrollz enabled: no\n Pathz enabled: no\n\nIf Credentialz is not enabled there is no exposure to this issue."}],"datePublic":"2026-09-09T00:00:00.000Z","descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"On affected platforms running Arista EOS with gRPC Network Security Interface (gNSI) Credentialz configured, a specially crafted request can cause unintended modifications to the target account's properties. This may result in the account being assigned elevated privileges or access beyond what an administrator intended.
"}],"value":"On affected platforms running Arista EOS with gRPC Network Security Interface (gNSI) Credentialz configured, a specially crafted request can cause unintended modifications to the target account's properties. This may result in the account being assigned elevated privileges or access beyond what an administrator intended."}],"impacts":[{"capecId":"CAPEC-88","descriptions":[{"lang":"en","value":"CAPEC-88 OS Command Injection"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]},{"cvssV4_0":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.6,"baseSeverity":"HIGH","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-77","description":"CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-09-16T08:14:40.485Z","orgId":"c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7","shortName":"Arista"},"references":[{"name":"Arista Networks Security Advisory 0165","tags":["vendor-advisory"],"url":"https://www.arista.com/en/support/advisories-notices/security-advisory/24721-security-advisory-0165"}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"The following EOS releases contain the fix for this vulnerability:
No hotfix is available for this vulnerability.
"}],"value":"The following EOS releases contain the fix for this vulnerability:\n - 4.33.9M and later releases in the 4.33.x train\n - 4.34.7.1M and later releases in the 4.34.x train\n - 4.35.6M and later releases in the 4.35.x train\n - 4.36.1F and later releases in the 4.36.x train\n\nNo hotfix is available for this vulnerability."}],"source":{"advisory":"Security Advisory 0165","defects":["BUG 1602633"],"discovery":"INTERNAL"},"title":"Security Advisory 0165","workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Disable gNSI Credentialz service. Note: Disabling Credentialz prevents gNSI-based credential rotation (SSH keys, passwords, host parameters) but does not affect traditional EOS CLI credential management. Credentialz is not enabled by default.
\nswitch(config)#management api gnsi\nswitch(config-mgmt-api-gnsi)#no service credentialz\n"}],"value":"Disable gNSI Credentialz service. Note: Disabling Credentialz prevents gNSI-based credential rotation (SSH keys, passwords, host parameters) but does not affect traditional EOS CLI credential management. Credentialz is not enabled by default.\n\n switch(config)#management api gnsi\n switch(config-mgmt-api-gnsi)#no service credentialz"}]}},"cveMetadata":{"assignerOrgId":"c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7","assignerShortName":"Arista","cveId":"CVE-2026-73454","datePublished":"2026-09-16T08:14:40.485Z","dateReserved":"2026-08-12T16:42:47.921Z","dateUpdated":"2026-09-17T03:56:53.682Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-16 09:17:05","lastModifiedDate":"2026-09-17 04:18:00","problem_types":["CWE-77","CWE-77 CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')"],"metrics":{"cvssMetricV40":[{"source":"psirt@arista.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":8.6,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"cvssMetricV31":[{"source":"psirt@arista.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","baseScore":8.1,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":5.2}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-09-16T00:00:00+00:00","id":"CVE-2026-73454","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"73454","Ordinal":"1","Title":"Security Advisory 0165","CVE":"CVE-2026-73454","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"73454","Ordinal":"1","NoteData":"On affected platforms running Arista EOS with gRPC Network Security Interface (gNSI) Credentialz configured, a specially crafted request can cause unintended modifications to the target account's properties. This may result in the account being assigned elevated privileges or access beyond what an administrator intended.","Type":"Description","Title":"Security Advisory 0165"}]}}}