{"id":"CVE-2026-9031","aliases":["EUVD-2026-54656","GHSA-7f4x-hjwm-h5px"],"status":"published","title":"Authenticated Denial-of-Service in HTTPD Service in TP-Link Archer A6","description":"An input validation\nvulnerability exists in the HTTP-WRITEOEM handler due to insufficient validation\nof user-supplied data before it is processed by internal flash-write handling\nlogic.\n\n\n\n\n\n\n\n\n\nSuccessful\nexploitation may cause httpd process or device to crash, resulting in loss of access\nto the web interface and a denial-of-service condition.","severity":{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00256,"percentile":0.17282,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2026-08-07T20:40:18Z","modified":"2026-10-24T13:10:00Z","products":[{"vendor":"tp-link systems inc.","product":"archer a6 v4"}],"references":[{"url":"https://www.tp-link.com/us/support/download/archer-a6/v4/#Firmware","tags":["patch"]},{"url":"https://www.tp-link.com/en/support/download/archer-a6/v4/#Firmware","tags":["patch"]},{"url":"https://www.tp-link.com/en/support/faq/5234/","tags":["vendor-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9031"},{"url":"https://www.tp-link.com/en/support/faq/5234"},{"url":"https://github.com/advisories/GHSA-7f4x-hjwm-h5px"}],"sources":{"cve":[{"id":"CVE-2026-9031","title":"Authenticated Denial-of-Service in HTTPD Service in TP-Link Archer A6","description":"An input validation\nvulnerability exists in the HTTP-WRITEOEM handler due to insufficient validation\nof user-supplied data before it is processed by internal flash-write handling\nlogic.\n\n\n\n\n\n\n\n\n\nSuccessful\nexploitation may cause httpd process or device to crash, resulting in loss of access\nto the web interface and a denial-of-service condition.","status":"published","published":"2026-08-07T20:40:18.549Z","modified":"2026-08-10T18:23:52.453Z","cvss":[{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T13:42:37.965383Z"}],"euvd":[{"id":"EUVD-2026-54656","description":"An input validation\nvulnerability exists in the HTTP-WRITEOEM handler due to insufficient validation\nof user-supplied data before it is processed by internal flash-write handling\nlogic.\n\n\n\n\n\n\n\n\n\nSuccessful\nexploitation may cause httpd process or device to crash, resulting in loss of access\nto the web interface and a denial-of-service condition.","status":"published","published":"2026-08-07T20:40:18Z","modified":"2026-08-10T18:23:52Z","cvss":[{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T18:02:01.104981Z"}],"ghsa":[{"id":"GHSA-7f4x-hjwm-h5px","title":"An input validation\nvulnerability exists in the HTTP-WRITEOEM handler due to insufficient...","description":"An input validation\nvulnerability exists in the HTTP-WRITEOEM handler due to insufficient validation\nof user-supplied data before it is processed by internal flash-write handling\nlogic.\n\n\n\n\n\n\n\n\n\nSuccessful\nexploitation may cause httpd process or device to crash, resulting in loss of access\nto the web interface and a denial-of-service condition.","status":"published","published":"2026-08-07T21:30:41Z","modified":"2026-08-07T21:30:46Z","cvss":[{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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","level":"medium"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:10:12.306859Z"}],"nvd":[{"id":"CVE-2026-9031","description":"An input validation\nvulnerability exists in the HTTP-WRITEOEM handler due to insufficient validation\nof user-supplied data before it is processed by internal flash-write handling\nlogic.\n\n\n\n\n\n\n\n\n\nSuccessful\nexploitation may cause httpd process or device to crash, resulting in loss of access\nto the web interface and a denial-of-service condition.","status":"published","published":"2026-08-07T21:17:30.53Z","modified":"2026-10-24T13:10:00.147Z","cvss":[{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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","level":"medium","assessor":"secondary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:12:35.743275Z"}]}}