{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-17251","assignerOrgId":"f23511db-6c3e-4e32-a477-6aa17d310630","state":"PUBLISHED","assignerShortName":"TPLink","dateReserved":"2026-07-24T22:03:11.872Z","datePublished":"2026-08-21T17:16:45.791Z","dateUpdated":"2026-08-21T17:40:36.098Z"},"containers":{"cna":{"providerMetadata":{"orgId":"f23511db-6c3e-4e32-a477-6aa17d310630","shortName":"TPLink","dateUpdated":"2026-08-21T17:16:45.791Z"},"title":"Unauthenticated Denial of Service via Null Pointer Dereference in HTTP Request Parsing","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-476","description":"CWE-476 NULL pointer dereference","type":"CWE"}]}],"impacts":[{"capecId":"CAPEC-135","descriptions":[{"lang":"en","value":"CAPEC-135 Format String Injection"}]}],"affected":[{"vendor":"TP-Link Systems Inc.","product":"TL-MR6400 v7.0","platforms":["Linux"],"versions":[{"status":"affected","version":"0","lessThan":"1.9.0 Build 260714","versionType":"custom"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"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.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>A NULL\npointer dereference vulnerability exists in the HTTP request parsing\nfunctionality of&nbsp;\nTL-MR6400 v7. An unauthenticated remote attacker can\ntrigger the vulnerability by sending a specially crafted HTTP request\ncontaining a malformed session cookie header. </p>\n\n<p>Successful\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.</p>"}]}],"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"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"ADJACENT","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"HIGH","baseScore":7.1,"vectorString":"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"}}],"credits":[{"lang":"en","value":"Rui Cheng Yu (Hina)","type":"finder"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.4"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-21T17:40:25.485077Z","id":"CVE-2026-17251","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-21T17:40:36.098Z"}}]}}