{"id":"CVE-2026-1637","state":"PUBLISHED","title":"Tenda AC21 AdvSetMacMtuWan fromAdvSetMacMtuWan stack-based overflow","description":"A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function fromAdvSetMacMtuWan of the file /goform/AdvSetMacMtuWan. The manipulation leads to stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.","publishedAt":"2026-01-29T22:32:07.685Z","updatedAt":"2026-02-23T09:07:49.829Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P","source":"VulDB"},"assigner":"VulDB","products":["Tenda AC21"],"affected":[{"vendor":"Tenda","product":"AC21","versions":[{"version":"16.03.08.16","status":"affected"}],"cpes":["cpe:2.3:o:tenda:ac21_firmware:*:*:*:*:*:*:*:*"]}],"references":["https://vuldb.com/?id.343416","https://vuldb.com/?ctiid.343416","https://vuldb.com/?submit.740865","https://github.com/LX-LX88/cve/issues/25","https://www.tenda.com.cn/"],"weaknesses":["CWE-121","CWE-119"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/1xxx/CVE-2026-1637.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-1637","state":"PUBLISHED","datePublished":"2026-01-29T22:32:07.685Z","dateUpdated":"2026-02-23T09:07:49.829Z","assignerShortName":"VulDB","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateReserved":"2026-01-29T16:56:17.581Z"},"containers":{"cna":{"title":"Tenda AC21 AdvSetMacMtuWan fromAdvSetMacMtuWan stack-based overflow","descriptions":[{"lang":"en","value":"A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function fromAdvSetMacMtuWan of the file /goform/AdvSetMacMtuWan. The manipulation leads to stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might be used."}],"affected":[{"vendor":"Tenda","product":"AC21","versions":[{"version":"16.03.08.16","status":"affected"}],"cpes":["cpe:2.3:o:tenda:ac21_firmware:*:*:*:*:*:*:*:*"]}],"references":[{"url":"https://vuldb.com/?id.343416","name":"VDB-343416 | Tenda AC21 AdvSetMacMtuWan fromAdvSetMacMtuWan stack-based overflow","tags":["vdb-entry","technical-description"]},{"url":"https://vuldb.com/?ctiid.343416","name":"VDB-343416 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"]},{"url":"https://vuldb.com/?submit.740865","name":"Submit #740865 | Tenda AC21 V16.03.08.16 Buffer Overflow","tags":["third-party-advisory"]},{"url":"https://github.com/LX-LX88/cve/issues/25","tags":["broken-link","exploit","issue-tracking"]},{"url":"https://www.tenda.com.cn/","tags":["product"]}],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":8.7,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P","baseSeverity":"HIGH"}},{"cvssV3_1":{"version":"3.1","baseScore":8.8,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R","baseSeverity":"HIGH"}},{"cvssV3_0":{"version":"3.0","baseScore":8.8,"vectorString":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R","baseSeverity":"HIGH"}},{"cvssV2_0":{"version":"2.0","baseScore":9,"vectorString":"AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-121","type":"CWE","lang":"en","description":"Stack-based Buffer Overflow"}]},{"descriptions":[{"cweId":"CWE-119","type":"CWE","lang":"en","description":"Memory Corruption"}]}],"providerMetadata":{"shortName":"VulDB","orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateUpdated":"2026-02-23T09:07:49.829Z"},"timeline":[{"time":"2026-01-29T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"time":"2026-01-29T01:00:00.000Z","lang":"en","value":"VulDB entry created"},{"time":"2026-02-04T03:53:45.000Z","lang":"en","value":"VulDB entry last update"}],"credits":[{"lang":"en","value":"LX-LX (VulDB User)","type":"reporter"}]},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/LX-LX88/cve/issues/25","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-01-30T14:36:34.085802Z","id":"CVE-2026-1637","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-02-02T16:33:53.523Z"}}]}}}