{"id":"CVE-2026-17251","aliases":["EUVD-2026-64007","GHSA-cfmx-mjrq-52xj"],"status":"published","title":"Unauthenticated Denial of Service via Null Pointer Dereference in HTTP Request Parsing","description":"A NULL\npointer dereference vulnerability exists in the HTTP request parsing\nfunctionality of \nTL-MR6400 v7. An unauthenticated remote attacker can\ntrigger the vulnerability by sending a specially crafted HTTP request\ncontaining a malformed session cookie header. \n\n\n\n\n\nSuccessful\nexploitation may cause the HTTP service process to crash, resulting in a\ndenial-of-service condition and temporary loss of management or CGI\nfunctionality until service recovery.","severity":{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0047,"percentile":0.40993,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-476"],"published":"2026-08-21T17:16:45Z","modified":"2026-10-14T19:10:00Z","products":[{"vendor":"tp-link systems inc.","product":"tl-mr6400 v7.0"}],"references":[{"url":"https://www.tp-link.com/en/support/download/tl-mr6400/v7/#Firmware","tags":["patch"]},{"url":"https://www.tp-link.com/tw/support/download/tl-mr6400/v7/#Firmware","tags":["patch"]},{"url":"https://www.tp-link.com/us/support/faq/5259/","tags":["vendor-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-17251"},{"url":"https://www.tp-link.com/us/support/faq/5259"},{"url":"https://github.com/advisories/GHSA-cfmx-mjrq-52xj"}],"sources":{"cve":[{"id":"CVE-2026-17251","title":"Unauthenticated Denial of Service via Null Pointer Dereference in HTTP Request Parsing","description":"A NULL\npointer dereference vulnerability exists in the HTTP request parsing\nfunctionality of \nTL-MR6400 v7. An unauthenticated remote attacker can\ntrigger the vulnerability by sending a specially crafted HTTP request\ncontaining a malformed session cookie header. \n\n\n\n\n\nSuccessful\nexploitation may cause the HTTP service process to crash, resulting in a\ndenial-of-service condition and temporary loss of management or CGI\nfunctionality until service recovery.","status":"published","published":"2026-08-21T17:16:45.791Z","modified":"2026-08-21T17:40:36.098Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:19:54.84674Z"}],"euvd":[{"id":"EUVD-2026-64007","description":"A NULL\npointer dereference vulnerability exists in the HTTP request parsing\nfunctionality of \nTL-MR6400 v7. An unauthenticated remote attacker can\ntrigger the vulnerability by sending a specially crafted HTTP request\ncontaining a malformed session cookie header. \n\n\n\n\n\nSuccessful\nexploitation may cause the HTTP service process to crash, resulting in a\ndenial-of-service condition and temporary loss of management or CGI\nfunctionality until service recovery.","status":"published","published":"2026-08-21T17:16:45Z","modified":"2026-08-21T17:40:36Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T18:01:37.198267Z"}],"ghsa":[{"id":"GHSA-cfmx-mjrq-52xj","title":"A NULL\npointer dereference vulnerability exists in the HTTP request parsing\nfunctionality of \nTL...","description":"A NULL\npointer dereference vulnerability exists in the HTTP request parsing\nfunctionality of \nTL-MR6400 v7. An unauthenticated remote attacker can\ntrigger the vulnerability by sending a specially crafted HTTP request\ncontaining a malformed session cookie header. \n\n\n\n\n\nSuccessful\nexploitation may cause the HTTP service process to crash, resulting in a\ndenial-of-service condition and temporary loss of management or CGI\nfunctionality until service recovery.","status":"published","published":"2026-08-21T18:34:58Z","modified":"2026-08-21T18:35:08Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/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":"high"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T15:10:50.012908Z"}],"nvd":[{"id":"CVE-2026-17251","description":"A NULL\npointer dereference vulnerability exists in the HTTP request parsing\nfunctionality of \nTL-MR6400 v7. An unauthenticated remote attacker can\ntrigger the vulnerability by sending a specially crafted HTTP request\ncontaining a malformed session cookie header. \n\n\n\n\n\nSuccessful\nexploitation may cause the HTTP service process to crash, resulting in a\ndenial-of-service condition and temporary loss of management or CGI\nfunctionality until service recovery.","status":"published","published":"2026-08-21T18:16:47.66Z","modified":"2026-10-14T19:10:00.297Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/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":"high","assessor":"secondary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:12:40.665005Z"}]}}