{"id":"CVE-2026-3622","aliases":["EUVD-2026-16419","GHSA-hhj2-6q7v-v5hc"],"status":"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 \u003c EN_0.9.1 4.19 Build 260303 Rel.42399n (V14_260303) and \u003c US_0.9.1.4.19 Build 260312 Rel. 49108n (V14_0304).","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":"2026-11-11","score":0.00372,"percentile":0.31572,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2026-03-26T20:34:36Z","modified":"2026-06-17T10:43:53Z","products":[{"vendor":"tp-link","product":"tl-wr841n_firmware"},{"vendor":"tp-link systems inc.","product":"tl-wr841n v14"}],"references":[{"url":"https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware","tags":["patch","Product"]},{"url":"https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware","tags":["patch","Product"]},{"url":"https://www.tp-link.com/us/support/faq/5033/","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3622"},{"url":"https://www.tp-link.com/us/support/faq/5033"},{"url":"https://github.com/advisories/GHSA-hhj2-6q7v-v5hc"}],"sources":{"cve":[{"id":"CVE-2026-3622","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 \u003c EN_0.9.1 4.19 Build 260303 Rel.42399n (V14_260303) and \u003c US_0.9.1.4.19 Build 260312 Rel. 49108n (V14_0304).","status":"published","published":"2026-03-26T20:34:36.49Z","modified":"2026-03-27T19:39:21.225Z","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-125"],"updated_at":"2026-11-02T13:49:09.229322Z"}],"euvd":[{"id":"EUVD-2026-16419","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 \u003c EN_0.9.1 4.19 Build 260303 Rel.42399n (V14_260303) and \u003c US_0.9.1.4.19 Build 260312 Rel. 49108n (V14_0304).","status":"published","published":"2026-03-26T20:34:36Z","modified":"2026-03-27T19:39:21Z","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":"2026-11-02T19:25:27.277964Z"}],"ghsa":[{"id":"GHSA-hhj2-6q7v-v5hc","title":"The vulnerability exists in the UPnP component of TL-WR841N v14, where improper input validation...","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 \u003c EN_0.9.1 4.19 Build 260303 Rel.42399n (V14_260303) and \u003c US_0.9.1.4.19 Build 260312 Rel. 49108n (V14_0304).","status":"published","published":"2026-03-26T21:31:28Z","modified":"2026-03-31T21:31:16Z","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"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:06:56.438153Z"}],"nvd":[{"id":"CVE-2026-3622","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 \u003c EN_0.9.1 4.19 Build 260303 Rel.42399n (V14_260303) and \u003c US_0.9.1.4.19 Build 260312 Rel. 49108n (V14_0304).","status":"published","published":"2026-03-26T21:17:09.697Z","modified":"2026-06-17T10:43:53.26Z","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"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:12:11.678711Z"}]}}