{"id":"CVE-2026-73468","state":"PUBLISHED","title":"Security Advisory 0175","description":"A specially crafted packet can cause the premature expiry of multicast forwarding state on affected interfaces, potentially resulting in temporary multicast traffic loss during the affected period.","publishedAt":"2026-09-16T09:55:17.069Z","updatedAt":"2026-09-16T13:37:56.689Z","severity":{"score":7.1,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L","source":"Arista"},"assigner":"Arista","products":["Arista Networks EOS"],"affected":[{"vendor":"Arista Networks","product":"EOS","defaultStatus":"unaffected","versions":[{"version":"1.0.0","status":"affected","lessThan":"4.33.0F","versionType":"custom"},{"version":"4.33.0F","status":"affected","lessThanOrEqual":"4.33.8M","versionType":"custom"},{"version":"4.34.0F","status":"affected","lessThanOrEqual":"4.34.7.1M","versionType":"custom"},{"version":"4.35.0F","status":"affected","lessThanOrEqual":"4.35.5M","versionType":"custom"},{"version":"4.36.0F","status":"affected","lessThanOrEqual":"4.36.1F","versionType":"custom"}]}],"references":["https://www.arista.com/en/support/advisories-notices/security-advisory/24731-security-advisory-0175"],"weaknesses":["CWE-670"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/73xxx/CVE-2026-73468.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-73468","state":"PUBLISHED","datePublished":"2026-09-16T09:55:17.069Z","dateUpdated":"2026-09-16T13:37:56.689Z","assignerShortName":"Arista","assignerOrgId":"c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7","dateReserved":"2026-08-12T16:47:18.121Z"},"containers":{"cna":{"title":"Security Advisory 0175","descriptions":[{"lang":"en","value":"A specially crafted packet can cause the premature expiry of multicast forwarding state on affected interfaces, potentially resulting in temporary multicast traffic loss during the affected period."}],"affected":[{"vendor":"Arista Networks","product":"EOS","defaultStatus":"unaffected","versions":[{"version":"1.0.0","status":"affected","lessThan":"4.33.0F","versionType":"custom"},{"version":"4.33.0F","status":"affected","lessThanOrEqual":"4.33.8M","versionType":"custom"},{"version":"4.34.0F","status":"affected","lessThanOrEqual":"4.34.7.1M","versionType":"custom"},{"version":"4.35.0F","status":"affected","lessThanOrEqual":"4.35.5M","versionType":"custom"},{"version":"4.36.0F","status":"affected","lessThanOrEqual":"4.36.1F","versionType":"custom"}]}],"references":[{"url":"https://www.arista.com/en/support/advisories-notices/security-advisory/24731-security-advisory-0175","tags":["vendor-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":6.5,"baseSeverity":"MEDIUM"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L","baseScore":7.1,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-670","lang":"en","type":"CWE","description":"CWE-670 Always-Incorrect Control Flow Implementation"}]}],"providerMetadata":{"shortName":"Arista","orgId":"c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7","dateUpdated":"2026-09-16T09:55:17.069Z"},"configurations":[{"lang":"en","value":"The vulnerability is exploitable on interfaces with PIM Sparse Mode configured:\n\nswitch(config)# interface Ethernet1\nswitch(config-if-Et1)# pim ipv4 sparse-mode","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>The vulnerability is exploitable on interfaces with PIM Sparse Mode configured:</p>\n<pre>\nswitch(config)# interface Ethernet1\nswitch(config-if-Et1)# pim ipv4 sparse-mode\n</pre>"}]}],"workarounds":[{"lang":"en","value":"There is no mitigation available to address this vulnerability.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>There is no mitigation available to address this vulnerability.</p>"}]}],"solutions":[{"lang":"en","value":"The following EOS releases contain the fix:\n- 4.33.9M and later in the 4.33.x train\n- 4.34.8M and later in the 4.34.x train\n- 4.35.6M and later in the 4.35.x train\n- 4.36.2F and later in the 4.36.x train\n\nNo hotfixes are available for this issue.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>The following EOS releases contain the fix:</p>\n<ul>\n<li>4.33.9M and later in the 4.33.x train</li>\n<li>4.34.8M and later in the 4.34.x train</li>\n<li>4.35.6M and later in the 4.35.x train</li>\n<li>4.36.2F and later in the 4.36.x train</li>\n</ul>\n<p>No hotfixes are available for this issue.</p>"}]}],"impacts":[{"capecId":"CAPEC-272","descriptions":[{"lang":"en","value":"CAPEC-272 Protocol Manipulation"}]}],"source":{"advisory":"Security Advisory 0175","discovery":"INTERNAL","defects":["BUG1857585"]},"datePublic":"2026-09-09T00:00:00.000Z"},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-16T13:36:14.973508Z","id":"CVE-2026-73468","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-16T13:37:56.689Z"}}]}}}