{"id":"CVE-2020-26728","aliases":["EUVD-2020-19266","GHSA-586v-26wc-h2mw"],"status":"published","title":"A vulnerability was discovered in Tenda AC9 v3.0 V15.03.06.42_multi and Tenda AC9 V1.0 V15.03.05...","description":"A vulnerability was discovered in Tenda AC9 v3.0 V15.03.06.42_multi and Tenda AC9 V1.0 V15.03.05.19(6318)_CN which allows for remote code execution via shell metacharacters in the guestuser field to the __fastcall function with a POST request.","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":0.03767,"percentile":0.89994,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2022-02-11T18:05:36Z","modified":"2026-06-17T03:08:19Z","products":[{"vendor":"tenda","product":"ac9_firmware"}],"references":[{"url":"https://github.com/Lyc-heng/Router/blob/main/Tenda/rce1.md","tags":["x_refsource_MISC","x_transferred","Broken Link"]},{"url":"https://github.com/Lyc-heng/routers/blob/a80b30bccfc9b76f3a4868ff28ad5ce2e0fca180/routers/rce1.md","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://github.com/Lyc-heng/routers/blob/main/routers/rce1.md","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-26728"},{"url":"https://github.com/advisories/GHSA-586v-26wc-h2mw"}],"sources":{"cve":[{"id":"CVE-2020-26728","description":"A vulnerability was discovered in Tenda AC9 v3.0 V15.03.06.42_multi and Tenda AC9 V1.0 V15.03.05.19(6318)_CN which allows for remote code execution via shell metacharacters in the guestuser field to the __fastcall function with a POST request.","status":"published","published":"2022-02-11T18:05:36Z","modified":"2024-08-04T15:56:05.058Z","updated_at":"2026-11-02T14:35:46.129376Z"}],"euvd":[{"id":"EUVD-2020-19266","description":"A vulnerability was discovered in Tenda AC9 v3.0 V15.03.06.42_multi and Tenda AC9 V1.0 V15.03.05.19(6318)_CN which allows for remote code execution via shell metacharacters in the guestuser field to the __fastcall function with a POST request.","status":"published","published":"2022-02-11T18:05:36Z","modified":"2024-08-04T15:56:05Z","updated_at":"2026-11-03T03:07:14.653267Z"}],"ghsa":[{"id":"GHSA-586v-26wc-h2mw","title":"A vulnerability was discovered in Tenda AC9 v3.0 V15.03.06.42_multi and Tenda AC9 V1.0 V15.03.05...","description":"A vulnerability was discovered in Tenda AC9 v3.0 V15.03.06.42_multi and Tenda AC9 V1.0 V15.03.05.19(6318)_CN which allows for remote code execution via shell metacharacters in the guestuser field to the __fastcall function with a POST request.","status":"published","published":"2022-02-12T00:00:38Z","modified":"2023-02-03T05:06:00Z","updated_at":"2026-11-02T14:53:49.735091Z"}],"nvd":[{"id":"CVE-2020-26728","description":"A vulnerability was discovered in Tenda AC9 v3.0 V15.03.06.42_multi and Tenda AC9 V1.0 V15.03.05.19(6318)_CN which allows for remote code execution via shell metacharacters in the guestuser field to the __fastcall function with a POST request.","status":"published","published":"2022-02-11T19:15:08.027Z","modified":"2026-06-17T03:08:19.867Z","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"}],"updated_at":"2026-11-02T14:06:46.951463Z"}]}}