{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-73460",
        "assignerOrgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7",
        "state": "PUBLISHED",
        "assignerShortName": "Arista",
        "dateReserved": "2026-08-12T16:45:03.511Z",
        "datePublished": "2026-09-15T23:20:43.813Z",
        "dateUpdated": "2026-09-16T19:35:40.181Z"
    },
    "containers": {
        "cna": {
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                "orgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7",
                "shortName": "Arista",
                "dateUpdated": "2026-09-15T23:20:43.813Z"
            },
            "title": "Security Advisory 0160",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-863",
                            "description": "CWE-863: Incorrect Authorization",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-272",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-272 Protocol Manipulation"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "Arista Networks",
                    "product": "EOS",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "4.36.0",
                            "lessThanOrEqual": "4.36.1F",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "On affected platforms running Arista EOS with IS-IS graceful restart enabled, an unauthenticated attacker who can inject a malformed IS-IS LSP PDU packet can cause the IS-IS graceful restart procedure to terminate prematurely. This may result in traffic loss following a restart event.",
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                            "value": "<p>On affected platforms running Arista EOS with IS-IS graceful restart enabled, an unauthenticated attacker who can inject a malformed IS-IS LSP PDU packet can cause the IS-IS graceful restart procedure to terminate prematurely. This may result in traffic loss following a restart event.</p>"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://www.arista.com/en/support/advisories-notices/security-advisory/24716-security-advisory-0160",
                    "name": "Security Advisory 0160",
                    "tags": [
                        "vendor-advisory"
                    ]
                }
            ],
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                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
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                    ],
                    "cvssV3_1": {
                        "version": "3.1",
                        "attackVector": "ADJACENT_NETWORK",
                        "attackComplexity": "HIGH",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "CHANGED",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "availabilityImpact": "HIGH",
                        "baseSeverity": "MEDIUM",
                        "baseScore": 6.1,
                        "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H"
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                },
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                    "format": "CVSS",
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                        "vulnConfidentialityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "HIGH",
                        "subAvailabilityImpact": "HIGH",
                        "exploitMaturity": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "valueDensity": "NOT_DEFINED",
                        "vulnerabilityResponseEffort": "NOT_DEFINED",
                        "providerUrgency": "NOT_DEFINED",
                        "version": "4.0",
                        "baseSeverity": "HIGH",
                        "baseScore": 7,
                        "vectorString": "CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H"
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                }
            ],
            "configurations": [
                {
                    "lang": "en",
                    "value": "In order to be vulnerable to CVE-2026-73460, the following condition must be met: IS-IS graceful-restart should be enabled.\n\n\n\nswitch(config-router-isis)#show active\nrouter isis 1\n   net 49.0001.1111.1111.1001.00\n   graceful-restart\n\n\n\nswitch#show isis graceful-restart\nIS-IS Instance: 1 VRF: default\n  System ID: 1111.1111.1001\n  Graceful Restart: Enabled, Graceful Restart Helper: Enabled\n  State: Graceful Restart disabled during startup\n  T1 : 3s\n  T2 (level-1) : 30s/not running\n  T2 (level-2) : 30s/not running\n  T3 : not running\n  System ID          Type    Interface          Restart Capable   Status    \n  1111.1111.1002     L1      Ethernet1          Yes               Running  \n\n\n\n\n\nIf IS-IS graceful-restart is not enabled, there is no exposure to this issue.",
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                            "base64": false,
                            "value": "<p>In order to be vulnerable to CVE-2026-73460, the following condition must be met: IS-IS graceful-restart should be enabled.</p><pre>switch(config-router-isis)#show active\nrouter isis 1\n&nbsp;&nbsp;&nbsp;net 49.0001.1111.1111.1001.00\n&nbsp;&nbsp;&nbsp;graceful-restart<br><br><pre>switch#show isis graceful-restart\nIS-IS Instance: 1 VRF: default\n&nbsp;&nbsp;System ID: 1111.1111.1001\n&nbsp;&nbsp;Graceful Restart: Enabled, Graceful Restart Helper: Enabled\n&nbsp;&nbsp;State: Graceful Restart disabled during startup\n&nbsp;&nbsp;T1 : 3s\n&nbsp;&nbsp;T2 (level-1) : 30s/not running\n&nbsp;&nbsp;T2 (level-2) : 30s/not running\n&nbsp;&nbsp;T3 : not running\n&nbsp;&nbsp;System ID&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Type&nbsp; &nbsp; Interface&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Restart Capable &nbsp; Status&nbsp;&nbsp;&nbsp;&nbsp;\n&nbsp;&nbsp;1111.1111.1002 &nbsp; &nbsp; L1&nbsp; &nbsp; &nbsp; Ethernet1&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Yes &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Running&nbsp; </pre></pre><p>If IS-IS graceful-restart is not enabled, there is no exposure to this issue.</p>"
                        }
                    ]
                }
            ],
            "workarounds": [
                {
                    "lang": "en",
                    "value": "No workaround is available for this issue.",
                    "supportingMedia": [
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                            "base64": false,
                            "value": "<p>No workaround is available for this issue.</p>"
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                    ]
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            ],
            "solutions": [
                {
                    "lang": "en",
                    "value": "The recommended resolution is to upgrade to a fixed software version.",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "<p>The recommended resolution is to upgrade to a fixed software version.</p>"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "This issue was discovered internally by Arista and the company is not aware of any malicious uses of these issues in customer networks.",
                    "type": "finder"
                }
            ],
            "source": {
                "advisory": "0160",
                "discovery": "UNKNOWN",
                "defects": [
                    "BUG1840562"
                ]
            },
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                "engine": "Vulnogram 1.0.5"
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        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-16T19:35:29.181267Z",
                                "id": "CVE-2026-73460",
                                "options": [
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                                        "Exploitation": "none"
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                                        "Technical Impact": "partial"
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                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
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                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
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                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-16T19:35:40.181Z"
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