{"id":"CVE-2021-45989","aliases":["EUVD-2021-32695","GHSA-68r5-4w98-6xwq"],"status":"published","title":"Tenda routers G1 and G3 v15.11.0.17(9502)_CN were discovered to contain a stack overflow in the...","description":"Tenda routers G1 and G3 v15.11.0.17(9502)_CN were discovered to contain a stack overflow in the function guestWifiRuleRefresh. This vulnerability allows attackers to cause a Denial of Service (DoS) via the qosGuestUpstream and qosGuestDownstream parameters.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01082,"percentile":0.65445,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2022-02-04T01:33:46Z","modified":"2026-06-17T04:14:22Z","products":[{"vendor":"tendacn","product":"g1_firmware"},{"vendor":"tendacn","product":"g3_firmware"}],"references":[{"url":"https://github.com/pjqwudi/my_vuln/blob/main/Tenda/vuln_4/4.md","tags":["x_refsource_MISC","x_transferred","Broken Link"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-45989"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/218959","tags":["Third Party Advisory"]},{"url":"https://github.com/advisories/GHSA-68r5-4w98-6xwq"}],"sources":{"cve":[{"id":"CVE-2021-45989","description":"Tenda routers G1 and G3 v15.11.0.17(9502)_CN were discovered to contain a stack overflow in the function guestWifiRuleRefresh. This vulnerability allows attackers to cause a Denial of Service (DoS) via the qosGuestUpstream and qosGuestDownstream parameters.","status":"published","published":"2022-02-04T01:33:46Z","modified":"2024-08-04T04:54:31.137Z","updated_at":"2026-11-02T14:33:02.580561Z"}],"euvd":[{"id":"EUVD-2021-32695","description":"Tenda routers G1 and G3 v15.11.0.17(9502)_CN were discovered to contain a stack overflow in the function guestWifiRuleRefresh. This vulnerability allows attackers to cause a Denial of Service (DoS) via the qosGuestUpstream and qosGuestDownstream parameters.","status":"published","published":"2022-02-04T01:33:46Z","modified":"2024-08-04T04:54:31Z","updated_at":"2026-11-03T03:08:25.222984Z"}],"ghsa":[{"id":"GHSA-68r5-4w98-6xwq","title":"Tenda routers G1 and G3 v15.11.0.17(9502)_CN were discovered to contain a stack overflow in the...","description":"Tenda routers G1 and G3 v15.11.0.17(9502)_CN were discovered to contain a stack overflow in the function guestWifiRuleRefresh. This vulnerability allows attackers to cause a Denial of Service (DoS) via the qosGuestUpstream and qosGuestDownstream parameters.","status":"published","published":"2022-02-09T00:00:45Z","modified":"2023-02-03T05:05:40Z","cwes":["CWE-787"],"updated_at":"2026-11-02T14:53:46.857381Z"}],"nvd":[{"id":"CVE-2021-45989","description":"Tenda routers G1 and G3 v15.11.0.17(9502)_CN were discovered to contain a stack overflow in the function guestWifiRuleRefresh. This vulnerability allows attackers to cause a Denial of Service (DoS) via the qosGuestUpstream and qosGuestDownstream parameters.","status":"published","published":"2022-02-04T02:15:08.677Z","modified":"2026-06-17T04:14:22.473Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:07:04.178977Z"}]}}