{"id":"CVE-2026-12935","state":"PUBLISHED","title":"Unauthenticated Remote Code Execution in TP-Link TL-WR940N RTSP Conntrack Feature","description":"The\nTL-WR940N v6 router contains a vulnerability in its RTSP connection tracking\nmodule that can lead to a stack-based buffer overflow. The issue occurs when a\nLAN client initiates a connection to a malicious RTSP server controlled by an\nattacker. A specially crafted RTSP message may trigger improper memory handling\nwithin the kernel module\n\n\n\n\n\n\n\n\n\nSuccessful\nexploitation of this vulnerability may result in a denial-of-service (DoS)\ncondition or allow remote code execution (RCE), potentially leading to full\ncompromise of the device. This vulnerability can be exploited by an\nunauthenticated attacker under the device's default configuration.","publishedAt":"2026-07-29T18:20:06.417Z","updatedAt":"2026-07-30T03:55:40.565Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"TPLink"},"assigner":"TPLink","products":["TP-Link Systems Inc. TL-WR940N v6"],"affected":[{"vendor":"TP-Link Systems Inc.","product":"TL-WR940N v6","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"(US)_V6_260528","versionType":"custom"},{"version":"0","status":"affected","lessThan":"(JP)_V6_260527","versionType":"custom"},{"version":"0","status":"affected","lessThan":"(EU)_V6_260528","versionType":"custom"}]}],"references":["https://www.tp-link.com/us/support/download/tl-wr940n/v6/#Firmware","https://www.tp-link.com/en/support/download/tl-wr940n/v6/#Firmware","https://www.tp-link.com/jp/support/download/tl-wr940n/v6/#Firmware","https://www.tp-link.com/us/support/faq/5213/"],"weaknesses":["CWE-121"],"ingestedAt":"2026-10-29T20:10:52.580Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/12xxx/CVE-2026-12935.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-12935","state":"PUBLISHED","datePublished":"2026-07-29T18:20:06.417Z","dateUpdated":"2026-07-30T03:55:40.565Z","assignerShortName":"TPLink","assignerOrgId":"f23511db-6c3e-4e32-a477-6aa17d310630","dateReserved":"2026-06-22T18:48:17.939Z"},"containers":{"cna":{"title":"Unauthenticated Remote Code Execution in TP-Link TL-WR940N RTSP Conntrack Feature","descriptions":[{"lang":"en","value":"The\nTL-WR940N v6 router contains a vulnerability in its RTSP connection tracking\nmodule that can lead to a stack-based buffer overflow. The issue occurs when a\nLAN client initiates a connection to a malicious RTSP server controlled by an\nattacker. A specially crafted RTSP message may trigger improper memory handling\nwithin the kernel module\n\n\n\n\n\n\n\n\n\nSuccessful\nexploitation of this vulnerability may result in a denial-of-service (DoS)\ncondition or allow remote code execution (RCE), potentially leading to full\ncompromise of the device. This vulnerability can be exploited by an\nunauthenticated attacker under the device's default configuration."}],"affected":[{"vendor":"TP-Link Systems Inc.","product":"TL-WR940N v6","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"(US)_V6_260528","versionType":"custom"},{"version":"0","status":"affected","lessThan":"(JP)_V6_260527","versionType":"custom"},{"version":"0","status":"affected","lessThan":"(EU)_V6_260528","versionType":"custom"}]}],"references":[{"url":"https://www.tp-link.com/us/support/download/tl-wr940n/v6/#Firmware","tags":["patch"]},{"url":"https://www.tp-link.com/en/support/download/tl-wr940n/v6/#Firmware","tags":["patch"]},{"url":"https://www.tp-link.com/jp/support/download/tl-wr940n/v6/#Firmware","tags":["patch"]},{"url":"https://www.tp-link.com/us/support/faq/5213/","tags":["vendor-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","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":8.7,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-121","lang":"en","description":"CWE-121 Stack-based buffer overflow","type":"CWE"}]}],"providerMetadata":{"shortName":"TPLink","orgId":"f23511db-6c3e-4e32-a477-6aa17d310630","dateUpdated":"2026-07-29T18:20:06.417Z"},"impacts":[{"capecId":"CAPEC-100","descriptions":[{"lang":"en","value":"CAPEC-100 Overflow Buffers"}]}],"credits":[{"lang":"en","value":"Ryo Shimada, University of Tsukuba; Powder Keg Technologies, Inc.","type":"finder"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.2"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-29T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-12935"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-30T03:55:40.565Z"}}]}}}