{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-73468", "assignerOrgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7", "state": "PUBLISHED", "assignerShortName": "Arista", "dateReserved": "2026-08-12T16:47:18.121Z", "datePublished": "2026-09-16T09:55:17.069Z", "dateUpdated": "2026-09-16T09:55:17.069Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7", "shortName": "Arista", "dateUpdated": "2026-09-16T09:55:17.069Z"}, "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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>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.</p>"}]}], "affected": [{"vendor": "Arista Networks", "product": "EOS", "defaultStatus": "unaffected", "versions": [{"version": "1.0.0", "lessThan": "4.33.0F", "status": "affected", "versionType": "custom"}, {"version": "4.33.0F", "lessThanOrEqual": "4.33.8M", "status": "affected", "versionType": "custom"}, {"version": "4.34.0F", "lessThanOrEqual": "4.34.7.1M", "status": "affected", "versionType": "custom"}, {"version": "4.35.0F", "lessThanOrEqual": "4.35.5M", "status": "affected", "versionType": "custom"}, {"version": "4.36.0F", "lessThanOrEqual": "4.36.1F", "status": "affected", "versionType": "custom"}]}], "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>"}]}], "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": [{"lang": "en", "type": "CWE", "cweId": "CWE-670", "description": "CWE-670 Always-Incorrect Control Flow Implementation"}]}], "references": [{"url": "https://www.arista.com/en/support/advisories-notices/security-advisory/24731-security-advisory-0175", "tags": ["vendor-advisory"]}], "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"}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "EOS", "vendor": "Arista Networks", "versions": [{"lessThan": "4.33.0F", "status": "affected", "version": "1.0.0", "versionType": "custom"}, {"lessThanOrEqual": "4.33.8M", "status": "affected", "version": "4.33.0F", "versionType": "custom"}, {"lessThanOrEqual": "4.34.7.1M", "status": "affected", "version": "4.34.0F", "versionType": "custom"}, {"lessThanOrEqual": "4.35.5M", "status": "affected", "version": "4.35.0F", "versionType": "custom"}, {"lessThanOrEqual": "4.36.1F", "status": "affected", "version": "4.36.0F", "versionType": "custom"}]}], "source": "psirt@arista.com"}], "cveTags": [], "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."}], "id": "CVE-2026-73468", "lastModified": "2026-09-16T10:16:52.383", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "psirt@arista.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "ADJACENT", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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/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", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "psirt@arista.com", "type": "Secondary"}]}, "published": "2026-09-16T10:16:52.383", "references": [{"source": "psirt@arista.com", "url": "https://www.arista.com/en/support/advisories-notices/security-advisory/24731-security-advisory-0175"}], "sourceIdentifier": "psirt@arista.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-670"}], "source": "psirt@arista.com", "type": "Secondary"}]}

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