{"id":"CVE-2019-12789","aliases":["EUVD-2019-4372","GHSA-c7v4-8hc9-h72r"],"status":"published","title":"An issue was discovered on Actiontec T2200H T2200H-31.128L.08 devices, as distributed by Telus....","description":"An issue was discovered on Actiontec T2200H T2200H-31.128L.08 devices, as distributed by Telus. By attaching a UART adapter to the UART pins on the system board, an attacker can use a special key sequence (Ctrl-\\) to obtain a shell with root privileges. After gaining root access, the attacker can mount the filesystem read-write and make permanent modifications to the device including bricking of the device, disabling vendor management of the device, preventing automatic upgrades, and permanently installing malicious code on the device.","severity":{"version":"3.0","score":6.8,"vector":"CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00574,"percentile":0.47752,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2019-06-17T16:19:57Z","modified":"2026-06-17T02:15:28Z","products":[{"vendor":"actiontec","product":"t2200h_firmware"}],"references":[{"url":"https://www.actiontec.com/blog/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"http://seclists.org/fulldisclosure/2019/Jun/10","tags":["x_refsource_MISC","x_transferred","Exploit","Mailing List","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-12789"},{"url":"https://github.com/advisories/GHSA-c7v4-8hc9-h72r"}],"sources":{"cve":[{"id":"CVE-2019-12789","description":"An issue was discovered on Actiontec T2200H T2200H-31.128L.08 devices, as distributed by Telus. By attaching a UART adapter to the UART pins on the system board, an attacker can use a special key sequence (Ctrl-\\) to obtain a shell with root privileges. After gaining root access, the attacker can mount the filesystem read-write and make permanent modifications to the device including bricking of the device, disabling vendor management of the device, preventing automatic upgrades, and permanently installing malicious code on the device.","status":"published","published":"2019-06-17T16:19:57Z","modified":"2024-08-04T23:32:55.167Z","updated_at":"2026-11-02T14:20:23.697579Z"}],"euvd":[{"id":"EUVD-2019-4372","description":"An issue was discovered on Actiontec T2200H T2200H-31.128L.08 devices, as distributed by Telus. By attaching a UART adapter to the UART pins on the system board, an attacker can use a special key sequence (Ctrl-\\) to obtain a shell with root privileges. After gaining root access, the attacker can mount the filesystem read-write and make permanent modifications to the device including bricking of the device, disabling vendor management of the device, preventing automatic upgrades, and permanently installing malicious code on the device.","status":"published","published":"2019-06-17T16:19:57Z","modified":"2024-08-04T23:32:55Z","updated_at":"2026-11-03T02:40:44.884887Z"}],"ghsa":[{"id":"GHSA-c7v4-8hc9-h72r","title":"An issue was discovered on Actiontec T2200H T2200H-31.128L.08 devices, as distributed by Telus....","description":"An issue was discovered on Actiontec T2200H T2200H-31.128L.08 devices, as distributed by Telus. By attaching a UART adapter to the UART pins on the system board, an attacker can use a special key sequence (Ctrl-\\) to obtain a shell with root privileges. After gaining root access, the attacker can mount the filesystem read-write and make permanent modifications to the device including bricking of the device, disabling vendor management of the device, preventing automatic upgrades, and permanently installing malicious code on the device.","status":"published","published":"2022-05-24T16:48:08Z","modified":"2023-01-28T05:05:39Z","updated_at":"2026-11-02T14:44:21.953506Z"}],"nvd":[{"id":"CVE-2019-12789","description":"An issue was discovered on Actiontec T2200H T2200H-31.128L.08 devices, as distributed by Telus. By attaching a UART adapter to the UART pins on the system board, an attacker can use a special key sequence (Ctrl-\\) to obtain a shell with root privileges. After gaining root access, the attacker can mount the filesystem read-write and make permanent modifications to the device including bricking of the device, disabling vendor management of the device, preventing automatic upgrades, and permanently installing malicious code on the device.","status":"published","published":"2019-06-17T17:15:11.193Z","modified":"2026-06-17T02:15:28.827Z","cvss":[{"version":"3.0","score":6.8,"vector":"CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:05:16.285679Z"}]}}