Improper Authentication in Multiple TP-Link WiFi Repeaters

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-109506
StatePUBLISHED
AssignerTPLink
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-14 19:17:09 UTC
Updated2026-10-14 19:17:09 UTC
DescriptionMultiple TP-Link Wi-Fi range extenders use a custom, reversible XOR-and-dictionary transformation in the HTTP web-management login flow. An unauthenticated attacker on the same local network who can capture the network traffic associated with legitimate administrator login may be able to derive an alternative credential value that produces the same accepted authentication result and use it to authenticate to the device’s web-management interface with administrator privileges. Exploitation requires the management login to use HTTP and the attacker to observe the session key, dictionary, and login value associated with a legitimate administrator login. Successful exploitation may allow an unauthenticated adjacent attacker to gain administrator access to the affected device and modify exposed configuration settings.

Risk And Classification

Primary CVSS: v4.0 5.9 MEDIUM from f23511db-6c3e-4e32-a477-6aa17d310630

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/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

Problem Types: CWE-287 | CWE-287 CWE-287 Improper Authentication

VersionSourceTypeScoreSeverityVector
4.0f23511db-6c3e-4e32-a477-6aa17d310630Secondary5.9MEDIUMCVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS5.9MEDIUMCVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Adjacent
Attack Complexity
High
Attack Requirements
None
Privileges Required
None
User Interaction
Passive
Confidentiality
High
Integrity
None
Availability
None
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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/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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA TP-Link Systems Inc. RE190 V5 affected V5_260904 custom Not specified
CNA TP-Link Systems Inc. RE200 V5 affected V5_260904 custom Not specified
CNA TP-Link Systems Inc. RE205 V4 affected V4_260904 custom Not specified
CNA TP-Link Systems Inc. RE215 V1 affected V1_260904 custom Not specified
CNA TP-Link Systems Inc. RE220 V3 affected V3_260904 custom Not specified
CNA TP-Link Systems Inc. RE230 V2 affected V2_260904 custom Not specified
CNA TP-Link Systems Inc. RE300 V2 affected V2_260904 custom Not specified
CNA TP-Link Systems Inc. RE305 V4 affected V4_260904 custom Not specified
CNA TP-Link Systems Inc. RE330 V1 affected V1_260904 custom Not specified
CNA TP-Link Systems Inc. RE335 V1 affected V1_260904 custom Not specified
CNA TP-Link Systems Inc. RE365 V2 affected V2_260904 custom Not specified
CNA TP-Link Systems Inc. RE365 V3 affected V3_260904 custom Not specified
CNA TP-Link Systems Inc. RE750C V4 affected V4_260904 custom Not specified
CNA TP-Link Systems Inc. RE450 V4.8 affected V4_260915 custom Not specified
CNA TP-Link Systems Inc. RE550 V1 affected V1_260915 custom Not specified
CNA TP-Link Systems Inc. RE315 V1 affected V1_260904 rel3959 custom Not specified

References

ReferenceSourceLinkTags
www.tp-link.com/us/support/download f23511db-6c3e-4e32-a477-6aa17d310630 www.tp-link.com
www.tp-link.com/en/support/download f23511db-6c3e-4e32-a477-6aa17d310630 www.tp-link.com
www.tp-link.com/us/support/faq/5344 f23511db-6c3e-4e32-a477-6aa17d310630 www.tp-link.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Lukas Palm (en)

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