{"schemaVersion":3,"id":"CVE-2026-5851","aliases":[],"status":"published","duplicateOf":null,"title":"Totolink A7100RU CGI cstecgi.cgi setUPnPCfg os command injection","description":"A security flaw has been discovered in Totolink A7100RU 7.4cu.2313_b20191024. This impacts the function setUPnPCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument enable results in os command injection. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.","dates":{"published":"2026-04-09T06:00:16.723Z","modified":"2026-04-09T12:13:58.251Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":10,"severity":"high","version":"2.0","versionLabel":"v2.0","source":"CVE.org","vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":9.3,"severity":"critical","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","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","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/E:P/RL:X/RC:R","exploitability":null,"impact":null,"computed":false},{"version":"3.0","versionLabel":"v3.0","source":"CVE.org","score":9.8,"severity":"critical","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"CVE.org","score":10,"severity":"high","vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":8.9,"severity":"high","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/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":10,"severity":"high","vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.03253,"percentile":0.88266,"severity":"low","asOf":"2026-10-22T00:00:00.000Z","change":{"pp":-10.114,"baselineDate":"2026-09-22T00:00:00.000Z","baselineScore":0.13367},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.13367,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.13367,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.13367,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.13367,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.13367,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.13367,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.13367,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.13367,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.13367,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.13367,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.03253,"percentile":0.88266}],"last30":[{"date":"2026-09-22T00:00:00.000Z","score":0.13367,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.13367,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.03253,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.03253,"percentile":0.88266}]},"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_LITENGZHENG_VULDB_NEW","name":"Vuldb New","source":"github","url":"https://github.com/Litengzheng/vuldb_new/blob/main/CH22/vul_50/README.md","maturity":"poc","reliabilityScore":0.3,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"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"},{"id":"CWE-78","name":"Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","description":"The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/78.html"}],"affected":[{"vendor":"totolink","product":"a7100ru_firmware","name":"a7100ru firmware","label":"a7100ru_firmware","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"7.4cu.2313_b20191024","noFixRecorded":false,"fixedIn":null}],"versionsText":"7.4cu.2313_b20191024","eol":null,"hubHref":"/vendor/totolink/a7100ru"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://vuldb.com/vuln/356377","label":"vuldb.com/vuln/356377","hostname":"vuldb.com","tags":["VDB Entry","Technical Description"]},{"url":"https://vuldb.com/vuln/356377/cti","label":"vuldb.com/vuln/356377/cti","hostname":"vuldb.com","tags":["Signature","Permissions Required"]},{"url":"https://vuldb.com/submit/791271","label":"vuldb.com/submit/791271","hostname":"vuldb.com","tags":["Third Party Advisory"]},{"url":"https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_157/README.md","label":"github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_157/README.md","hostname":"github.com","tags":["Exploit"]},{"url":"https://www.totolink.net/","label":"www.totolink.net","hostname":"www.totolink.net","tags":["Product"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-04-09T06:00:16.723Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-09T12:13:58.251Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":90,"level":"critical","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T18:01:43.799Z","stale":false,"partial":false}}