{"id":"CVE-2026-4252","state":"PUBLISHED","title":"Tenda AC8 IPv6 check_is_ipv6 ip address for authentication","description":"A vulnerability was identified in Tenda AC8 16.03.50.11. Affected by this issue is the function check_is_ipv6 of the component IPv6 Handler. The manipulation leads to reliance on ip address for authentication. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.","publishedAt":"2026-03-16T16:32:10.508Z","updatedAt":"2026-03-16T18:07:41.022Z","severity":{"score":9.3,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P","source":"VulDB"},"assigner":"VulDB","products":["Tenda AC8"],"affected":[{"vendor":"Tenda","product":"AC8","versions":[{"version":"16.03.50.11","status":"affected"}],"cpes":["cpe:2.3:o:tenda:ac8_firmware:*:*:*:*:*:*:*:*"],"modules":["IPv6 Handler"]}],"references":["https://vuldb.com/?id.351210","https://vuldb.com/?ctiid.351210","https://vuldb.com/?submit.771759","https://github.com/digitalandrew/tenda_ac8_v5/blob/main/poc_ipv6_auth_bypass.py","https://www.tenda.com.cn/"],"weaknesses":["CWE-291","CWE-287"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/4xxx/CVE-2026-4252.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-4252","state":"PUBLISHED","datePublished":"2026-03-16T16:32:10.508Z","dateUpdated":"2026-03-16T18:07:41.022Z","assignerShortName":"VulDB","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateReserved":"2026-03-16T06:16:02.051Z"},"containers":{"cna":{"title":"Tenda AC8 IPv6 check_is_ipv6 ip address for authentication","descriptions":[{"lang":"en","value":"A vulnerability was identified in Tenda AC8 16.03.50.11. Affected by this issue is the function check_is_ipv6 of the component IPv6 Handler. The manipulation leads to reliance on ip address for authentication. It is possible to initiate the attack remotely. The exploit is publicly available and might be used."}],"affected":[{"vendor":"Tenda","product":"AC8","versions":[{"version":"16.03.50.11","status":"affected"}],"cpes":["cpe:2.3:o:tenda:ac8_firmware:*:*:*:*:*:*:*:*"],"modules":["IPv6 Handler"]}],"references":[{"url":"https://vuldb.com/?id.351210","name":"VDB-351210 | Tenda AC8 IPv6 check_is_ipv6 ip address for authentication","tags":["vdb-entry","technical-description"]},{"url":"https://vuldb.com/?ctiid.351210","name":"VDB-351210 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"]},{"url":"https://vuldb.com/?submit.771759","name":"Submit #771759 | Tenda AC8 V5 V16.03.50.11 Authentication Bypass Issues","tags":["third-party-advisory"]},{"url":"https://github.com/digitalandrew/tenda_ac8_v5/blob/main/poc_ipv6_auth_bypass.py","tags":["exploit"]},{"url":"https://www.tenda.com.cn/","tags":["product"]}],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":9.3,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P","baseSeverity":"CRITICAL"}},{"cvssV3_1":{"version":"3.1","baseScore":9.8,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:W/RC:R","baseSeverity":"CRITICAL"}},{"cvssV3_0":{"version":"3.0","baseScore":9.8,"vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:W/RC:R","baseSeverity":"CRITICAL"}},{"cvssV2_0":{"version":"2.0","baseScore":10,"vectorString":"AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:W/RC:UR"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-291","type":"CWE","lang":"en","description":"Reliance on IP Address for Authentication"}]},{"descriptions":[{"cweId":"CWE-287","type":"CWE","lang":"en","description":"Improper Authentication"}]}],"providerMetadata":{"shortName":"VulDB","orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateUpdated":"2026-03-16T16:32:10.508Z"},"timeline":[{"time":"2026-03-16T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"time":"2026-03-16T01:00:00.000Z","lang":"en","value":"VulDB entry created"},{"time":"2026-03-16T07:21:15.000Z","lang":"en","value":"VulDB entry last update"}],"credits":[{"lang":"en","value":"DigitalAndrew (VulDB User)","type":"reporter"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-16T18:07:31.177772Z","id":"CVE-2026-4252","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-03-16T18:07:41.022Z"}}]}}}