{"api_version":"1","generated_at":"2026-11-11T05:23:02+00:00","cve":"CVE-2026-121368","urls":{"html":"https://cve.report/CVE-2026-121368","api":"https://cve.report/api/cve/CVE-2026-121368.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-121368","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-121368"},"summary":{"title":"Security Advisory 0206","description":"On affected platforms running Arista EOS with Bidirectional Forwarding Detection (BFD) configured to use keyed MD5 or keyed SHA1 authentication, an unauthenticated attacker with network adjacency (direct or multi-hop) to a BFD-enabled interface can send a specially crafted BFD packet resulting in a system reboot.","state":"PUBLISHED","assigner":"Arista","published_at":"2026-11-10 20:18:56","updated_at":"2026-11-10 20:18:56"},"problem_types":["CWE-787","CWE-787 CWE-787 Out-of-bounds 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appliance"]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"This issue was discovered externally by Joshua Foote from the XOR team at JP Morgan Chase & Co.","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","platforms":["710 Series","720D Series","720XP/722XPM Series","750X Series","7010TX Series","7020R/R4 Series","7130 Series running EOS","7170 Series","7050X3/X4 Series","7060X/X2/X4/X5/X6/XE7 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","ZTX-7200 Series","CloudEOS","cEOS-lab","vEOS-lab","CloudVision eXchange, virtual or physical appliance"],"product":"EOS","vendor":"Arista 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section router bfd\nrouter bfd\n   authentication mode sha1 shared-secret profile profile1\n\nswitch(s1)#show running-config section router bfd\nrouter bfd\n   authentication mode sha1 shared-secret profile profile1 meticulous\n\n(Per-interface config may also apply:)\nswitch(s1)#show running-config section bfd\ninterface Ethernet1\n   bfd authentication mode md5 shared-secret profile profile1</pre>"}],"value":"switch(s1)#show running-config section router bfd\nrouter bfd\n   authentication mode md5 shared-secret profile profile1\n\n(or meticulous mode, or sha1 variants)\n\nswitch(s1)#show running-config section router bfd\nrouter bfd\n   authentication mode md5 shared-secret profile profile1 meticulous\n\nswitch(s1)#show running-config section router bfd\nrouter bfd\n   authentication mode sha1 shared-secret profile profile1\n\nswitch(s1)#show running-config section router bfd\nrouter bfd\n   authentication mode sha1 shared-secret profile profile1 meticulous\n\n(Per-interface config may also apply:)\nswitch(s1)#show running-config section bfd\ninterface Ethernet1\n   bfd authentication mode md5 shared-secret profile profile1"}],"credits":[{"lang":"en","type":"reporter","value":"This issue was discovered externally by Joshua Foote from the XOR team at JP Morgan Chase & Co."}],"descriptions":[{"lang":"en","value":"On affected platforms running Arista EOS with Bidirectional Forwarding Detection (BFD) configured to use keyed MD5 or keyed SHA1 authentication, an unauthenticated attacker with network adjacency (direct or multi-hop) to a BFD-enabled interface can send a specially crafted BFD packet resulting in a system reboot."}],"impacts":[{"capecId":"CAPEC-100","descriptions":[{"lang":"en","value":"CAPEC-100 Overflow 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