{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-5090", "assignerOrgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7", "state": "PUBLISHED", "assignerShortName": "Arista", "dateReserved": "2025-05-22T16:26:48.444Z", "datePublished": "2026-06-05T15:49:27.770Z", "dateUpdated": "2026-06-05T15:49:27.770Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7", "shortName": "Arista", "dateUpdated": "2026-06-05T15:49:27.770Z"}, "title": "Arista CloudVision Exchange Cluster Instability via Unexpected Switch Messages", "datePublic": "2025-11-18T16:46:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-20", "description": "CWE-20: Improper Input Validation", "type": "CWE"}]}], "affected": [{"vendor": "Arista Networks", "product": "EOS / CloudVision eXchange (CVX)", "platforms": ["CloudVision eXchange", "virtual or physical appliance"], "versions": [{"status": "affected", "version": "4.34.0F", "lessThanOrEqual": "4.34.1F", "versionType": "custom"}, {"status": "affected", "version": "4.33.0M", "lessThanOrEqual": "4.33.4M", "versionType": "custom"}, {"status": "affected", "version": "4.32.0M", "lessThanOrEqual": "4.32.6M", "versionType": "custom"}, {"status": "affected", "version": "4.31.0", "lessThan": "4.32.0", "versionType": "custom"}, {"status": "affected", "version": "4.30.0", "lessThan": "4.31.0", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "CVX is not resilient to unexpected messages from a connected switch. This leads to agent crashes on CVX causing instability in the CVX cluster. An attacker could use this behavior to create a denial of service (DoS) scenario. Note that this would require the attacker to have a high privilege access to the connected switch to be able to send custom TCP packets to the CVX.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>CVX is not resilient to unexpected messages from a connected switch. This leads to agent crashes on CVX causing instability in the CVX cluster. An attacker could use this behavior to create a denial of service (DoS) scenario. Note that this would require the attacker to have a high privilege access to the connected switch to be able to send custom TCP packets to the CVX.</p>"}]}], "references": [{"url": "https://www.arista.com/en/support/advisories-notices/security-advisory/22868-security-advisory-0126", "tags": ["vendor-advisory"]}], "configurations": [{"lang": "en", "value": "In order to be vulnerable to CVE-2025-5090, the following condition must be met: CVX must be configured:\n\n\n\n\ncvx1#show cvx\n Status: Enabled\n Mode: Standalone\n Heartbeat interval: 20.0\n Heartbeat timeout: 60.0\n Client connection state preserving: Disabled\n \ncvx1#show running-config section cvx\ncvx\n no shutdown", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>In order to be vulnerable to CVE-2025-5090, the following condition must be met: CVX must be configured:</p>\n<pre><code>cvx1#show cvx\n Status: Enabled\n Mode: Standalone\n Heartbeat interval: 20.0\n Heartbeat timeout: 60.0\n Client connection state preserving: Disabled\n \ncvx1#show running-config section cvx\ncvx\n no shutdown</code></pre>"}]}], "workarounds": [{"lang": "en", "value": "There is no mitigation for this issue.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>There is no mitigation for this issue.</p>"}]}], "solutions": [{"lang": "en", "value": "The recommended resolution is to upgrade to a remediated software version at your earliest convenience. CVE-2025-5090 has been fixed in the following releases:\n\n\n\n * 4.34.2F and later releases in the 4.34.x train\n\n * 4.33.5M and later releases in the 4.33.x train\n\n * 4.32.7M and later releases in the 4.32.x train", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>The recommended resolution is to upgrade to a remediated software version at your earliest convenience. CVE-2025-5090 has been fixed in the following releases:</p>\n<ul>\n <li>4.34.2F and later releases in the 4.34.x train</li>\n <li>4.33.5M and later releases in the 4.33.x train</li>\n <li>4.32.7M and later releases in the 4.32.x train</li>\n</ul>"}]}], "source": {"defect": ["BUG1139764"], "advisory": "0126", "discovery": "INTERNAL"}, "x_generator": {"engine": "Vulnogram"}, "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseSeverity": "MEDIUM", "baseScore": 6.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "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": 7.1, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}}], "x_capecAlignment": {"capecId": "CAPEC-125", "capecName": "Flooding / Malformed Packet", "justification": "An attacker with high privilege access over a downstream switch can emit unexpected or malformed TCP packets causing state management code on CVX (ControllerOob/Controllerdb) to throw unhandled faults, leading to ongoing client deregistration cycles and cluster instability."}}}}

{}

{}

{}

{}