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CVE-2026-109506— Improper Authentication in Multiple TP-Link WiFi Repeaters

Quick assessment

Affected
TP-Link Systems Inc. RE190 v5
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

多个 TP-Link Wi-Fi 信号扩展器在其 HTTP Web 管理登录流程中，使用了一种自定义的可逆 XOR 与字典变换机制。位于同一本地网络且未经验证身份的攻击者，若能捕获合法管理员登录时的网络流量，可能推导出一个能够产生相同验证结果的替代凭据值，并利用该值以管理员权限访问设备的 Web 管理界面。 成功利用此漏洞的前提是：设备的管理登录采用 HTTP 协议（而非 HTTPS），且攻击者能够观测到合法管理员登录过程中涉及的会话密钥（session key）、字典表以及登录值。 成功利用该漏洞可使相邻的未授权

CVSS 5.9 · Medium EPSS 0.35% · P27

Affected Version Matrix 16

VendorProduct Version RangeStatus
TP-Link Systems Inc. RE190 v5 < V5_260904 affected
TP-Link Systems Inc. RE200 v5 < V5_260904 affected
TP-Link Systems Inc. RE205 v4 < V4_260904 affected
TP-Link Systems Inc. RE215 v1 < V1_260904 affected
TP-Link Systems Inc. RE220 v3 < V3_260904 affected
TP-Link Systems Inc. RE230 v2 < V2_260904 affected
TP-Link Systems Inc. RE300 v2 < V2_260904 affected
TP-Link Systems Inc. RE305 v4 < V4_260904 affected
TP-Link Systems Inc. RE315 v1 < V1_260904 rel3959 affected
TP-Link Systems Inc. RE330 v1 < V1_260904 affected
TP-Link Systems Inc. RE335 v1 < V1_260904 affected
TP-Link Systems Inc. RE365 v2 < V2_260904 affected
TP-Link Systems Inc. RE365 v3 < V3_260904 affected
TP-Link Systems Inc. RE450 v4.8 < V4_260915 affected
TP-Link Systems Inc. RE550 v1 < V1_260915 affected
TP-Link Systems Inc. RE750C v4 < V4_260904 affected
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I. Basic Information for CVE-2026-109506

Vulnerability Information
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Vulnerability Title
Improper Authentication in Multiple TP-Link WiFi Repeaters
Source: CVE Program / CVE List V5
Vulnerability Description
Multiple 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
TP-Link Systems Inc. RE190 v5 0 ~ V5_260904 -
TP-Link Systems Inc. RE200 v5 0 ~ V5_260904 -
TP-Link Systems Inc. RE205 v4 0 ~ V4_260904 -
TP-Link Systems Inc. RE215 v1 0 ~ V1_260904 -
TP-Link Systems Inc. RE220 v3 0 ~ V3_260904 -
TP-Link Systems Inc. RE230 v2 0 ~ V2_260904 -
TP-Link Systems Inc. RE300 v2 0 ~ V2_260904 -
TP-Link Systems Inc. RE305 v4 0 ~ V4_260904 -
TP-Link Systems Inc. RE330 v1 0 ~ V1_260904 -
TP-Link Systems Inc. RE335 v1 0 ~ V1_260904 -
TP-Link Systems Inc. RE365 v2 0 ~ V2_260904 -
TP-Link Systems Inc. RE365 v3 0 ~ V3_260904 -
TP-Link Systems Inc. RE750C v4 0 ~ V4_260904 -
TP-Link Systems Inc. RE450 v4.8 0 ~ V4_260915 -
TP-Link Systems Inc. RE550 v1 0 ~ V1_260915 -
TP-Link Systems Inc. RE315 v1 0 ~ V1_260904 rel3959 -

II. Public POCs for CVE-2026-109506

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III. Intelligence Information for CVE-2026-109506

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Vendor Pages for CVE-2026-109506 (2)

Other References for CVE-2026-109506 (1)

Same Patch Batch · TP-Link Systems Inc. · 2026-10-14 · 3 CVEs total

CVE-2026-108473 8.7 HIGH Improper Authentication and Credential Exposure in Multiple TP-Link Kasa Devices
CVE-2026-107795 7.5 HIGH Improper Authorization in TP-Link Omada Controller TLS Certificate and Private Key Managem

IV. Related Vulnerabilities

Same vendor: TP-Link Systems Inc.
Same weakness: CWE-287

V. Comments for CVE-2026-109506

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