{"schemaVersion":3,"id":"CVE-2021-41437","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"An HTTP response splitting attack in web application in ASUS RT-AX88U before v3.0.0.4.388.20558 allows an attacker to craft a specific URL that if an authenticated victim visits it, the URL will give access to the cloud storage of the attacker.","dates":{"published":"2022-09-26T13:18:38.000Z","modified":"2025-05-21T18:37:09.543Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.01111,"percentile":0.65459,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.13900000000000007,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00972},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00972,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00972,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00972,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00972,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00972,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00972,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00972,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00972,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00972,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01111,"percentile":0.65459}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00972,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00972,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00972,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01111,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01111,"percentile":0.65459}]},"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":[],"exploitCount":0,"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"}],"affected":[{"vendor":"asus","product":"rt-ax88u_firmware","name":"rt-ax88u firmware","label":"rt-ax88u_firmware","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"< 3.0.0.4.388.20558","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.0.0.4.388.20558","eol":null,"hubHref":"/vendor/asus/rt-ax88u"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/efchatz/easy-exploits/tree/main/Web/ASUS/CVE-2021-41437","label":"github.com/efchatz/easy-exploits/tree/main/Web/ASUS/CVE-2021-41437","hostname":"github.com","tags":["X Refsource MISC","Patch","Third Party Advisory"]},{"url":"https://www.asus.com/Networking-IoT-Servers/WiFi-Routers/ASUS-Gaming-Routers/RT-AX88U/HelpDesk_BIOS/","label":"www.asus.com/Networking-IoT-Servers/WiFi-Routers/ASUS-Gaming-Routers/RT-AX88U/HelpDesk_BIOS/","hostname":"www.asus.com","tags":["X Refsource CONFIRM","Patch","Product","Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2022-09-26T13:18:38.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-05-21T18:37:09.543Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":26,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T04:42:41.774Z","stale":false,"partial":false}}