{"schemaVersion":3,"id":"CVE-2025-9090","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"A vulnerability was identified in Tenda AC20 16.03.08.12. Affected is the function websFormDefine of the file /goform/telnet of the component Telnet Service. The manipulation leads to command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.","dates":{"published":"2025-08-17T02:02:07.488Z","modified":"2025-08-18T17:46:22.525Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.8,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":5.3,"severity":"medium","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":6.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","exploitability":null,"impact":null,"computed":false},{"version":"3.0","versionLabel":"v3.0","source":"CVE.org","score":6.3,"severity":"medium","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"CVE.org","score":6.5,"severity":"medium","vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":2.1,"severity":"low","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":6.5,"severity":"medium","vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.16651,"percentile":0.97015,"severity":"medium","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":2.5459999999999985,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.14105},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.14105,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.14105,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.14105,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.14105,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.14105,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.14105,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.14105,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.14105,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.14105,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.14105,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.14678,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.14678,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.14678,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.15178,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.15178,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.15178,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.16651,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.16651,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.16651,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.16651,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.16651,"percentile":0.97015}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.14105,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.14105,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.14105,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.14678,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.14678,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.14678,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.15178,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.15178,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.15178,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.15298,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.16651,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.16651,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.16651,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.16651,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.16651,"percentile":0.97015}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"GITHUB_ZZ2266_.GITHUB.IO","name":".Github.Io","source":"github","url":"https://github.com/ZZ2266/.github.io/tree/main/WAVLINK/WL-WN578W2/live_online.shtml","maturity":"poc","reliabilityScore":0.3,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null},{"id":"52418","name":"Tenda AC20 16.03.08.12 - Command Injection","source":"exploit-database","url":"https://www.exploit-db.com/exploits/52418","maturity":"poc","reliabilityScore":0.5,"verified":false,"type":"remote","platforms":["multiple"],"requiresAuth":null,"exploitdb":{"verified":false,"type":"remote","platform":"multiple","file":"exploits/multiple/remote/52418.c","codes":["CVE-2025-9090"]},"metasploit":null}],"exploitCount":2,"weaknesses":[{"id":"CWE-74","name":"Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')","description":"The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/74.html"},{"id":"CWE-77","name":"Improper Neutralization of Special Elements used in a Command ('Command Injection')","description":"The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/77.html"}],"affected":[{"vendor":"tenda","product":"ac20_firmware","name":"ac20 firmware","label":"ac20_firmware","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"16.03.08.12","noFixRecorded":false,"fixedIn":null}],"versionsText":"16.03.08.12","eol":null,"hubHref":"/vendor/tenda/ac20"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://vuldb.com/?id.320358","label":"vuldb.com?id.320358","hostname":"vuldb.com","tags":["VDB Entry","Technical Description","Third Party Advisory"]},{"url":"https://vuldb.com/?ctiid.320358","label":"vuldb.com?ctiid.320358","hostname":"vuldb.com","tags":["Signature","Permissions Required","VDB Entry"]},{"url":"https://vuldb.com/?submit.632232","label":"vuldb.com?submit.632232","hostname":"vuldb.com","tags":["Third Party Advisory","VDB Entry"]},{"url":"https://github.com/ZZ2266/.github.io/blob/main/AC20/telnet/readme.md","label":"github.com/ZZ2266/.github.io/blob/main/AC20/telnet/readme.md","hostname":"github.com","tags":["Related","Exploit","Third Party Advisory"]},{"url":"https://github.com/ZZ2266/.github.io/blob/main/AC20/telnet/readme.md#poc-exploit-steps","label":"github.com/ZZ2266/.github.io/blob/main/AC20/telnet/readme.md","hostname":"github.com","tags":["Exploit","Third Party Advisory"]},{"url":"https://www.tenda.com.cn/","label":"www.tenda.com.cn","hostname":"www.tenda.com.cn","tags":["Product"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2025-08-17T02:02:07.488Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-08-18T17:46:22.525Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T12:29:18.977Z","stale":false,"partial":false}}