CVE-2026-8170

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An attacker with low-privilege CLI access can create a symbolic link that references a privileged filesystem location and then invoke the affected utilities to read, modify, or replace security-critical files outside of their authorized scope. Under certain conditions, this may enable escalation to root-level access and persistent modification of the device software stack. Exploitation is possible remotely by an attacker holding a low-privilege account, or locally via the serial console.\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>The mv, cp, and rm file utilities exposed within the ExtremeXOS (EXOS) shell environment fail to safely canonicalize paths and follow symbolic links outside of the intended privilege boundary. 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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. 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