CVE-2026-8169

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The challenge value is generated using an insufficiently random source, which under certain conditions may allow an attacker to predict the expected response and activate debug-mode without authorization. Depending on device configuration and version, this may enable escalation to root-level access and persistent modification of the device software stack. Exploitation requires either a valid low-privilege account on the device (remote scenario) or physical serial console access (local scenario). This vulnerability is distinct from CVE-2017-14329, which addressed a different issue involving Python script privileges.\n\n\n\nExtreme would like to thank Hadrien Barral (Universit\u00e9 Gustave Eiffel) and Georges-Axel Jaloyan (French Ministry of the Interior) for responsible disclosure of their findings.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>ExtremeXOS (EXOS) uses a challenge-response mechanism to authorize access to the privileged debug-mode function. 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This vulnerability is distinct from CVE-2017-14329, which addressed a different issue involving Python script privileges.</p><p>Extreme would like to thank Hadrien Barral (Universit\u00e9 Gustave Eiffel) and Georges-Axel Jaloyan (French Ministry of the Interior) for responsible disclosure of their findings.</p>"}]}], "references": [{"url": "https://www.extremenetworks.com/support/policies/product-security", "name": "Extreme Networks Product Security", "tags": ["vendor-advisory"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "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": 8.7, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}], "workarounds": [{"lang": "en", "value": "Where immediate upgrade is not feasible, customers should: (1) restrict CLI access to trusted administrators only; (2) enforce strong authentication and rotate any default credentials; (3) restrict physical access to serial console ports; and (4) monitor device logs for unexpected debug-mode activation attempts.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Where immediate upgrade is not feasible, customers should: (1) restrict CLI access to trusted administrators only; (2) enforce strong authentication and rotate any default credentials; (3) restrict physical access to serial console ports; and (4) monitor device logs for unexpected debug-mode activation attempts.</p>"}]}], "solutions": [{"lang": "en", "value": "Extreme Networks has released fixed versions of Switch Engine (EXOS) that address this vulnerability. Customers should upgrade to one of the following releases or later: 31.7.4, 32.7.4.15, 33.1.100, or 33.7.1.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Extreme Networks has released fixed versions of Switch Engine (EXOS) that address this vulnerability. Customers should upgrade to one of the following releases or later: 31.7.4, 32.7.4.15, 33.1.100, or 33.7.1.</p>"}]}], "credits": [{"lang": "en", "value": "Extreme would like to thank Hadrien Barral (Universit\u00e9 Gustave Eiffel) and Georges-Axel Jaloyan (French Ministry of the Interior) for responsible disclosure of their findings.", "type": "finder"}], "source": {"advisory": "SA-2026-087", "discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.2"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-20T18:26:07.254983Z", "id": "CVE-2026-8169", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-20T18:26:18.638Z"}}]}}

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