{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-1637","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","state":"PUBLISHED","assignerShortName":"VulDB","dateReserved":"2026-01-29T16:56:17.581Z","datePublished":"2026-01-29T22:32:07.685Z","dateUpdated":"2026-02-23T09:07:49.829Z"},"containers":{"cna":{"providerMetadata":{"orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","shortName":"VulDB","dateUpdated":"2026-02-23T09:07:49.829Z"},"title":"Tenda AC21 AdvSetMacMtuWan fromAdvSetMacMtuWan stack-based overflow","problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-121","lang":"en","description":"Stack-based Buffer Overflow"}]},{"descriptions":[{"type":"CWE","cweId":"CWE-119","lang":"en","description":"Memory Corruption"}]}],"affected":[{"vendor":"Tenda","product":"AC21","versions":[{"version":"16.03.08.16","status":"affected"}],"cpes":["cpe:2.3:o:tenda:ac21_firmware:*:*:*:*:*:*:*:*"]}],"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."}],"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"}}],"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"}],"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"]}]},"adp":[{"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"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-02-02T16:33:53.523Z"}}]}}