In order to be vulnerable to CVE-2026-73457, gNPSI must be configured with trace facility EosRpcAuth enabled explicitly:
switch> show trace Gnpsi | grep Auth\nEosRpcAuth enabled 0123456789.
Systems remain unaffected if gNPSI is not enabled (default configuration):
switch> show management api gnpsi\nEnabled: no transports enabled"}],"value":"In order to be vulnerable to CVE-2026-73457, gNPSI must be configured with trace facility EosRpcAuth enabled explicitly:\n\n\n\nswitch> show trace Gnpsi | grep Auth\nEosRpcAuth enabled 0123456789.\n\n\n\nSystems remain unaffected if gNPSI is not enabled (default configuration):\n\n\n\nswitch> show management api gnpsi\nEnabled: no transports enabled"}],"credits":[{"lang":"en","type":"finder","value":"This issue was discovered internally by Arista."}],"datePublic":"2026-09-09T18:55:00.000Z","descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"
Under certain circumstances on affected platforms running Arista EOS with gRPC Network Packet Sampling Interface (gNPSI) enabled, the gNPSI client credentials might be logged in clear text in local or remote accounting logs to authenticated users.
"}],"value":"Under certain circumstances on affected platforms running Arista EOS with gRPC Network Packet Sampling Interface (gNPSI) enabled, the gNPSI client credentials might be logged in clear text in local or remote accounting logs to authenticated users."}],"impacts":[{"capecId":"CAPEC-118","descriptions":[{"lang":"en","value":"CAPEC-118 Information Disclosure"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]},{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-532","description":"CWE-532 Insertion of Sensitive Information into Log File","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-09-16T18:57:50.711Z","orgId":"c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7","shortName":"Arista"},"references":[{"tags":["vendor-advisory"],"url":"https://www.arista.com/en/support/advisories-notices/security-advisory/24714-security-advisory-0158"}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"The recommended resolution is to upgrade to a remediated software version at your earliest convenience. CVE-2026-73457 has been fixed in the following releases:
To secure the agent against CVE-2026-73457, the service must be configured to use mutual TLS and only x509-spiffe authentication must be enabled.
management security\n ssl profile P1\n certificate server.crt key server.key\n trust certificate ca_client.crt\n chain certificate ca_signing.crt\n!\nmanagement api gnpsi\n transport grpc t2\n ssl profile P1\n port 7001\n authentication username priority x509-spiffe\n no disabled\n
Logs are disabled by default, including the affected facility EosRpcAuth.To mitigate CVE-2026-73457, ensure the facility EosRpcAuth status is set to disabled. The command below can be used to restore all Gnpsi agent tracing to its default setting.
switch(config)# no trace Gnpsi setting\n
Should it be determined that sensitive information has been logged, the affected log files must be truncated and any compromised secrets rotated to prevent gNPSI client credentials leaking.
Use the following commands to clean up Gnpsi log files:
switch(config)# bash sudo truncate -s 0 /var/log/agents/Gnpsi*\n
Then use the following commands to clean up previously rotated old log files:
switch(config)# bash sudo find /var/log/agents -name 'Gnpsi*.gz' -type f -delete"}],"value":"To secure the agent against CVE-2026-73457, the service must be configured to use mutual TLS and only x509-spiffe authentication must be enabled.\n\n\n\nmanagement security\n ssl profile P1\n certificate server.crt key server.key\n trust certificate ca_client.crt\n chain certificate ca_signing.crt\n!\nmanagement api gnpsi\n transport grpc t2\n ssl profile P1\n port 7001\n authentication username priority x509-spiffe\n no disabled\n\n\n \n\n\n\nLogs are disabled by default, including the affected facility EosRpcAuth.To mitigate CVE-2026-73457, ensure the facility EosRpcAuth status is set to disabled. The command below can be used to restore all Gnpsi agent tracing to its default setting.\n\n\n\nswitch(config)# no trace Gnpsi setting\n\n\n \n\n\n\nShould it be determined that sensitive information has been logged, the affected log files must be truncated and any compromised secrets rotated to prevent gNPSI client credentials leaking.\n\n\n\nUse the following commands to clean up Gnpsi log files:\n\n\n\nswitch(config)# bash sudo truncate -s 0 /var/log/agents/Gnpsi*\n\n\n \n\n\n\nThen use the following commands to clean up previously rotated old log files:\n\n\n\nswitch(config)# bash sudo find /var/log/agents -name 'Gnpsi*.gz' -type f -delete"}],"x_generator":{"engine":"Vulnogram 1.0.5"}}},"cveMetadata":{"assignerOrgId":"c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7","assignerShortName":"Arista","cveId":"CVE-2026-73457","datePublished":"2026-09-16T18:57:50.711Z","dateReserved":"2026-08-12T16:45:03.510Z","dateUpdated":"2026-09-17T18:32:20.363Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-16 19:17:32","lastModifiedDate":"2026-09-17 19:16:57","problem_types":["CWE-532","CWE-532 CWE-532 Insertion of Sensitive Information into Log File"],"metrics":{"cvssMetricV40":[{"source":"psirt@arista.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/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":6,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","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:H/PR:L/UI:N/S:U/C:H/I:N/A:N","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":1.6,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-09-17T18:32:07.235252Z","id":"CVE-2026-73457","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"73457","Ordinal":"1","Title":"Under certain circumstances, the gNPSI client credentials might ","CVE":"CVE-2026-73457","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"73457","Ordinal":"1","NoteData":"Under certain circumstances on affected platforms running Arista EOS with gRPC Network Packet Sampling Interface (gNPSI) enabled, the gNPSI client credentials might be logged in clear text in local or remote accounting logs to authenticated users.","Type":"Description","Title":"Under certain circumstances, the gNPSI client credentials might "}]}}}