{"id":"CVE-2018-8879","aliases":["EUVD-2018-20487","GHSA-8c78-mq7w-pq49"],"status":"published","title":"Stack-based buffer overflow in Asuswrt-Merlin firmware for ASUS devices older than 384.4 and ASUS...","description":"Stack-based buffer overflow in Asuswrt-Merlin firmware for ASUS devices older than 384.4 and ASUS firmware before 3.0.0.4.382.50470 for devices allows remote attackers to execute arbitrary code by providing a long string to the blocking.asp page via a GET or POST request. Vulnerable parameters are flag, mac, and cat_id.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.16707,"percentile":0.9705,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2019-11-21T15:26:03Z","modified":"2026-06-17T02:05:34Z","products":[{"vendor":"asus","product":"rt-ac66u_firmware"}],"references":[{"url":"https://www.asus.com/Networking/RTAC66U/HelpDesk_BIOS","tags":["x_refsource_MISC","x_transferred","Product"]},{"url":"https://pagedout.institute/download/PagedOut_001_beta1.pdf","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-8879"},{"url":"https://github.com/advisories/GHSA-8c78-mq7w-pq49"}],"sources":{"cve":[{"id":"CVE-2018-8879","description":"Stack-based buffer overflow in Asuswrt-Merlin firmware for ASUS devices older than 384.4 and ASUS firmware before 3.0.0.4.382.50470 for devices allows remote attackers to execute arbitrary code by providing a long string to the blocking.asp page via a GET or POST request. Vulnerable parameters are flag, mac, and cat_id.","status":"published","published":"2019-11-21T15:26:03Z","modified":"2024-08-05T07:10:46.973Z","updated_at":"2026-11-02T14:35:04.172099Z"}],"euvd":[{"id":"EUVD-2018-20487","description":"Stack-based buffer overflow in Asuswrt-Merlin firmware for ASUS devices older than 384.4 and ASUS firmware before 3.0.0.4.382.50470 for devices allows remote attackers to execute arbitrary code by providing a long string to the blocking.asp page via a GET or POST request. Vulnerable parameters are flag, mac, and cat_id.","status":"published","published":"2019-11-21T15:26:03Z","modified":"2024-08-05T07:10:46Z","updated_at":"2026-11-03T02:40:01.4233Z"}],"ghsa":[{"id":"GHSA-8c78-mq7w-pq49","title":"Stack-based buffer overflow in Asuswrt-Merlin firmware for ASUS devices older than 384.4 and ASUS...","description":"Stack-based buffer overflow in Asuswrt-Merlin firmware for ASUS devices older than 384.4 and ASUS firmware before 3.0.0.4.382.50470 for devices allows remote attackers to execute arbitrary code by providing a long string to the blocking.asp page via a GET or POST request. Vulnerable parameters are flag, mac, and cat_id.","status":"published","published":"2022-05-24T17:01:39Z","modified":"2023-01-28T05:07:31Z","updated_at":"2026-11-02T14:44:32.070856Z"}],"nvd":[{"id":"CVE-2018-8879","description":"Stack-based buffer overflow in Asuswrt-Merlin firmware for ASUS devices older than 384.4 and ASUS firmware before 3.0.0.4.382.50470 for devices allows remote attackers to execute arbitrary code by providing a long string to the blocking.asp page via a GET or POST request. Vulnerable parameters are flag, mac, and cat_id.","status":"published","published":"2019-11-21T16:15:11.72Z","modified":"2026-06-17T02:05:34.513Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:04:59.278647Z"}]}}