{"affected":[{"defaultStatus":"unaffected","platforms":["710 Series","720D Series","720XP/722XPM Series","750X Series","7010TX Series","7020R/R4 Series","7130 Series running EOS","7150 Series","7170 Series","7050X3/X4 Series","7060X/X2/X4/X5/X6 Series","7260X/X3 Series","7280R/R2/R3/R4 Series","7300X/X3 Series","7320X Series","7358X4 Series","7368X4 Series","7388X5 Series","7500R/R2/R3 Series","7800R3/R4 Series","7700R4 Series","AWE 5000 Series","AWE 7200R Series","CloudEOS","cEOS-lab","vEOS-lab","CloudVision eXchange","virtual or physical appliance"],"product":"EOS","source":"CNA: Arista","vendor":"Arista Networks","versions":[{"lessThanOrEqual":"4.36.2F","status":"affected","version":"4.36.0F","versionType":"custom"},{"lessThanOrEqual":"4.35.6M","status":"affected","version":"4.35.0F","versionType":"custom"},{"lessThanOrEqual":"4.34.8M","status":"affected","version":"4.34.0F","versionType":"custom"},{"lessThanOrEqual":"4.33.10M","status":"affected","version":"4.33.0F","versionType":"custom"},{"lessThan":"4.33.0F","status":"affected","version":"1.0.0","versionType":"custom"}]}],"cveId":"CVE-2026-73440","cwes":["CWE-212"],"description":"On affected platforms running Arista EOS with Simple Network Management Protocol (SNMP) configured, SNMPv3 local or remote user credentials may be exposed as a one-way hashed, localized key value within the device's running and sanitized configurations. An authenticated user who gains access to this sensitive information could leverage it to perform unauthorized read operations on SNMP tables or to send fraudulent trap notifications to the Network Management System (NMS).\n\n\n\nThis issue was discovered internally by Arista, and the company is not aware of any malicious exploitation of this vulnerability in customer networks.","epss":{"date":"2026-11-07","percentile":0.18867,"score":0.00266},"exploits":[],"kev":null,"metrics":[{"score":4.2,"severity":"medium","source":"CNA: Arista","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},{"score":2.3,"severity":"low","source":"CNA: Arista","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},{"score":2.3,"severity":"low","source":"NVD: psirt@arista.com","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/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","version":"4.0"},{"score":4.2,"severity":"medium","source":"NVD: psirt@arista.com","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","version":"3.1"}],"modifiedAt":1794136594843,"publishedAt":1789552514571,"references":[{"source":"CNA: Arista","tags":["vendor-advisory"],"url":"https://www.arista.com/en/support/advisories-notices/security-advisory/24734-security-advisory-0178"},{"source":"psirt@arista.com","tags":[],"url":"https://www.arista.com/en/support/advisories-notices/security-advisory/24734-security-advisory-0178"}],"remediation":[{"kind":"fix","source":"CNA: Arista","text":"The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Arista recommends customers move to the latest version of each release that contains all the fixes listed below.\n\n\n\nFollowing the system upgrade, users are required to execute the syntax conversion command specified below to adopt the updated, encrypted SNMPv3 CLI format:\n\n\n\nswitch# configure convert new-syntax\n\n\n\nThe updated encrypted SNMPv3 CLI configuration follows this structure, incorporating the newly introduced \"key <algo> <encrypted_text>\" syntax:\n\n\n\nswitch# show running-config | grep snmp-server\nsnmp-server user alice group_alice v3 localized f5717f2cdde9bb946d00 auth sha256 key 7 005D110205085E520B754E1B591C504542585F557D2F217064607A10034752035500080755575640440F5C00505053515F08525208035C1605525E0A040E781F4D\n\n\n\nCVE-2026-73440 has been fixed in the following releases:\n\n  *  4.36.3M and later releases in the 4.36.x train\n  *  4.35.7M and later releases in the 4.35.x train\n  *  4.34.9M and later releases in the 4.34.x train\n  *  4.33.11M and later releases in the 4.33.x train"},{"kind":"workaround","source":"CNA: Arista","text":"CVE-2026-73440 can be remediated using the hotfix detailed below. This hotfix is strictly applicable to the listed releases. All non-listed versions must be upgraded to a fixed release as specified above.\n\n \n\n  *  4.36.2F\n  *  4.35.6M\n  *  4.34.8M\n  *  4.33.10M\n\n\n\n\nPost hotfix installation, users are required to execute the syntax conversion command to fix the malformed keys.\n\n\n\nNote: Installing/uninstalling the SWIX will cause the ConfigAgent process to restart.\n\nVersion: 1.0\nURL:  SecurityAdvisory178_CVE-2026-73440_Hotfix.swix https://www.arista.com/support/advisories-notices/sa-download/ \n\n\n\nSWIX hash:\n8a11df104d6ada97f0d63ca87a6a03071524038af1f8cd4a0bbcba490ab80245c7b2cfb86be81c5e6773e05801f3df098120f6053b130938230c79193386fe74\n\n \n\n\n\nFor instructions on installation and verification of the hotfix patch, refer to the “ managing eos extensions https://www.arista.com/en/um-eos/eos-managing-eos-extensions ” section in the EOS User Manual. Ensure that the patch is made persistent across reboots by running the command ‘copy installed-extensions boot-extensions’."}],"revision":"22ba1b0acc869a61c42d591bdd3143d96c416f80400ed2eeac807df0fc506c3b","sources":[{"modifiedAt":1794133904396,"name":"CNA: Arista","retrievedAt":1794136099586,"url":"https://www.cve.org/CVERecord?id=CVE-2026-73440"},{"modifiedAt":1794136594843,"name":"NVD","retrievedAt":1794140141838,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-73440"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794136100038,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-73440"}],"ssvc":{"assessedAt":1789566014055,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Security Advisory 0178","updatedAt":1794140141838}