{"affected":[{"defaultStatus":"unaffected","platforms":["710 Series","720D Series","720XP/722XPM Series","750X Series","7010TX Series","7020R/R4 Series","7280R/R2/R3/R4 Series","7500R/R2/R3 Series","7800R3/R4 Series","7700R4 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":"4.32.0F","versionType":"custom"},{"lessThan":"4.32.0F","status":"affected","version":"4.29.0F","versionType":"custom"},{"lessThan":"4.29.0F","status":"affected","version":"4.28.2F","versionType":"custom"}]}],"cveId":"CVE-2026-121294","cwes":["CWE-1284"],"description":"On affected platforms running Arista EOS with a S-BFD reflector proxy configured, an unauthenticated attacker could send a crafted S-BFD Protocol Data Unit (PDU) that might cause the device to temporarily cease reflecting S-BFD packets, potentially resulting in S-BFD session timeouts.","epss":{"date":"2026-11-13","percentile":0.35,"score":0.00402},"exploits":[],"kev":null,"metrics":[{"score":5.3,"severity":"medium","source":"CNA: Arista","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},{"score":6.9,"severity":"medium","source":"CNA: Arista","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"},{"score":6.9,"severity":"medium","source":"NVD: psirt@arista.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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":5.3,"severity":"medium","source":"NVD: psirt@arista.com","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}],"modifiedAt":1794591017946,"publishedAt":1794341399104,"references":[{"source":"CNA: Arista","tags":["vendor-advisory"],"url":"https://www.arista.com/en/support/advisories-notices/security-advisory/25045-security-advisory-0223"},{"source":"psirt@arista.com","tags":[],"url":"https://www.arista.com/en/support/advisories-notices/security-advisory/25045-security-advisory-0223"}],"remediation":[],"revision":"d1f6db8212f52259c241acb46385157a64ba7291c59a578904dd031729233aa5","sources":[{"modifiedAt":1794591017946,"name":"CNA: Arista","retrievedAt":1794593326173,"url":"https://www.cve.org/CVERecord?id=CVE-2026-121294"},{"modifiedAt":1794511477847,"name":"NVD","retrievedAt":1794529286241,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121294"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794593326544,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-121294"}],"ssvc":{"assessedAt":1794591005947,"automatable":"yes","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Security Advisory 0223","updatedAt":1794593326544}