{"id":"CVE-2026-109506","revision":null,"records":[{"revision":"917e75e21bbd408da429533e1bd9fbda","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-109506","aliases":[],"title":"Improper Authentication in Multiple TP-Link WiFi Repeaters","description":"Multiple\nTP-Link Wi-Fi range extenders use a custom, reversible XOR-and-dictionary\ntransformation in the HTTP web-management login flow. An unauthenticated attacker\non the same local network who can capture the network traffic associated with\nlegitimate administrator login may be able to derive an alternative credential\nvalue that produces the same accepted authentication result and use it to\nauthenticate to the device’s web-management interface with administrator\nprivileges. Exploitation requires the management login to use HTTP and the\nattacker to observe the session key, dictionary, and login value associated\nwith a legitimate administrator login.\n\n\n\n\n\nSuccessful\nexploitation may allow an unauthenticated adjacent attacker to gain\nadministrator access to the affected device and modify exposed configuration\nsettings.","state":0,"publishedAt":"2026-10-14T18:31:37.228+00:00","modifiedAt":"2026-10-15T19:33:44.764+00:00","affected":[{"ecosystem":"Vendor product","name":"RE190 v5","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"TP-Link Systems Inc.\",\n                    \"product\": \"RE190 v5\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"V5_260904\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"},{"ecosystem":"Vendor product","name":"RE200 v5","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"TP-Link Systems Inc.\",\n                    \"product\": \"RE200 v5\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"V5_260904\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"},{"ecosystem":"Vendor product","name":"RE205 v4","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"TP-Link Systems Inc.\",\n                    \"product\": \"RE205 v4\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"V4_260904\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"},{"ecosystem":"Vendor product","name":"RE215 v1","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"TP-Link Systems Inc.\",\n                    \"product\": \"RE215 v1\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"V1_260904\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"},{"ecosystem":"Vendor product","name":"RE220 v3","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"TP-Link Systems Inc.\",\n                    \"product\": \"RE220 v3\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"V3_260904\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"},{"ecosystem":"Vendor product","name":"RE230 v2","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"TP-Link Systems Inc.\",\n                    \"product\": \"RE230 v2\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"V2_260904\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"},{"ecosystem":"Vendor product","name":"RE300 v2","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"TP-Link Systems Inc.\",\n                    \"product\": \"RE300 v2\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"V2_260904\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"},{"ecosystem":"Vendor product","name":"RE305 v4","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"TP-Link Systems Inc.\",\n                    \"product\": \"RE305 v4\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"V4_260904\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"},{"ecosystem":"Vendor product","name":"RE330 v1","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"TP-Link Systems Inc.\",\n                    \"product\": \"RE330 v1\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"V1_260904\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"},{"ecosystem":"Vendor product","name":"RE335 v1","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"TP-Link Systems Inc.\",\n                    \"product\": \"RE335 v1\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"V1_260904\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"},{"ecosystem":"Vendor product","name":"RE365 v2","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"TP-Link Systems Inc.\",\n                    \"product\": \"RE365 v2\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"V2_260904\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"},{"ecosystem":"Vendor product","name":"RE365 v3","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"TP-Link Systems Inc.\",\n                    \"product\": \"RE365 v3\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"V3_260904\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"},{"ecosystem":"Vendor product","name":"RE750C v4","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"TP-Link Systems Inc.\",\n                    \"product\": \"RE750C v4\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"V4_260904\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"},{"ecosystem":"Vendor product","name":"RE450 v4.8","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"TP-Link Systems Inc.\",\n                    \"product\": \"RE450 v4.8\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"V4_260915\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"},{"ecosystem":"Vendor product","name":"RE550 v1","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"TP-Link Systems Inc.\",\n                    \"product\": \"RE550 v1\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"V1_260915\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"},{"ecosystem":"Vendor product","name":"RE315 v1","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"TP-Link Systems Inc.\",\n                    \"product\": \"RE315 v1\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"V1_260904 rel3959\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":5.9,"severity":"MEDIUM"}],"references":["https://www.tp-link.com/us/support/download/","https://www.tp-link.com/en/support/download/","https://www.tp-link.com/us/support/faq/5344/"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-109506","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-109506","identifiers":["CVE-2026-109506"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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