{"id":"CVE-2026-3622","state":"PUBLISHED","title":"Denial-of-Service Vulnerability in UPnP Component of TP Link's TL-WR841N","description":"The vulnerability exists in the UPnP component of TL-WR841N v14, where improper input validation leads to an out-of-bounds read, potentially causing a crash of the UPnP service.  \n\nSuccessful exploitation can cause the UPnP service to crash, resulting in a Denial-of-Service condition. \nThis vulnerability affects TL-WR841N v14 < EN_0.9.1 4.19 Build 260303 Rel.42399n (V14_260303) and < US_0.9.1.4.19 Build 260312 Rel. 49108n (V14_0304).","publishedAt":"2026-03-26T20:34:36.490Z","updatedAt":"2026-03-27T19:39:21.225Z","severity":{"score":7.1,"label":"High","version":"4.0","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","source":"TPLink"},"assigner":"TPLink","products":["TP-Link Systems Inc. TL-WR841N v14"],"affected":[{"vendor":"TP-Link Systems Inc.","product":"TL-WR841N v14","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"0.9.1 4.19","versionType":"custom"}],"platforms":["Linux"]}],"references":["https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware","https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware","https://www.tp-link.com/us/support/faq/5033/"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:11:50.837Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/3xxx/CVE-2026-3622.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-3622","state":"PUBLISHED","datePublished":"2026-03-26T20:34:36.490Z","dateUpdated":"2026-03-27T19:39:21.225Z","assignerShortName":"TPLink","assignerOrgId":"f23511db-6c3e-4e32-a477-6aa17d310630","dateReserved":"2026-03-06T00:09:48.566Z"},"containers":{"cna":{"title":"Denial-of-Service Vulnerability in UPnP Component of TP Link's TL-WR841N","descriptions":[{"lang":"en","value":"The vulnerability exists in the UPnP component of TL-WR841N v14, where improper input validation leads to an out-of-bounds read, potentially causing a crash of the UPnP service.  \n\nSuccessful exploitation can cause the UPnP service to crash, resulting in a Denial-of-Service condition. \nThis vulnerability affects TL-WR841N v14 < EN_0.9.1 4.19 Build 260303 Rel.42399n (V14_260303) and < US_0.9.1.4.19 Build 260312 Rel. 49108n (V14_0304)."}],"affected":[{"vendor":"TP-Link Systems Inc.","product":"TL-WR841N v14","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"0.9.1 4.19","versionType":"custom"}],"platforms":["Linux"]}],"references":[{"url":"https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware","tags":["patch"]},{"url":"https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware","tags":["patch"]},{"url":"https://www.tp-link.com/us/support/faq/5033/","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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","description":"CWE-125 Out-of-bounds read","type":"CWE"}]}],"providerMetadata":{"shortName":"TPLink","orgId":"f23511db-6c3e-4e32-a477-6aa17d310630","dateUpdated":"2026-03-26T20:34:36.490Z"},"impacts":[{"capecId":"CAPEC-540","descriptions":[{"lang":"en","value":"CAPEC-540 Overread Buffers"}]}],"credits":[{"lang":"en","value":"Md Sharafatullah Zomadder, Professor Rahamatullah Khondoker, Dept. of Business Informatics, THM University of Applied Sciences, Friedberg, Germany","type":"finder"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.1"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-3622","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-03-27T19:28:42.478378Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-03-27T19:39:21.225Z"}}]}}}