CVE-2026-109506
Improper Authentication in Multiple TP-Link WiFi Repeaters
Published Oct 14, 2026
CVSS 4.0 · 5.9 Medium
EPSS < 1%
KEV · Not listed
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.
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.
Affected Products
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CVE record
-
NVD configurations
No data
-
Red Hat packages
No data
-
OpenCVE enrichment
No data
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| TP-Link Systems Inc. | RE190 v5 | unaffected |
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| TP-Link Systems Inc. | RE200 v5 | unaffected |
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| TP-Link Systems Inc. | RE205 v4 | unaffected |
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| TP-Link Systems Inc. | RE215 v1 | unaffected |
|
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| TP-Link Systems Inc. | RE220 v3 | unaffected |
|
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| TP-Link Systems Inc. | RE230 v2 | unaffected |
|
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| TP-Link Systems Inc. | RE300 v2 | unaffected |
|
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| TP-Link Systems Inc. | RE305 v4 | unaffected |
|
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| TP-Link Systems Inc. | RE330 v1 | unaffected |
|
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| TP-Link Systems Inc. | RE335 v1 | unaffected |
|
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| TP-Link Systems Inc. | RE365 v2 | unaffected |
|
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| TP-Link Systems Inc. | RE365 v3 | unaffected |
|
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| TP-Link Systems Inc. | RE750C v4 | unaffected |
|
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| TP-Link Systems Inc. | RE450 v4.8 | unaffected |
|
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| TP-Link Systems Inc. | RE550 v1 | unaffected |
|
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| TP-Link Systems Inc. | RE315 v1 | unaffected |
|
No data.
No data.
No data available yet.
Remediation
Tracking
Advisories
Metrics
Attack Vector Adjacent Network
Attack Complexity High
Privileges Required None
Attack Requirements None
User Interaction Passive
Vulnerable System Confidentiality Impact High
Vulnerable System Integrity Impact None
Vulnerable System Availability Impact None
Subsequent System Confidentiality Impact None
Subsequent System Integrity Impact None
Subsequent System Availability Impact None
No CVSS v3.1
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.346% probability within 30 days)
Exploitation none
Automatable no
Technical Impact partial
References
History
Oct 15, 2026 8:30 PM
Scoring metrics updated
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Oct 14, 2026 6:45 PM
Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Improper Authentication in Multiple TP-Link WiFi Repeaters | |
| Weaknesses | CWE-287 | |
| References |
| |
| Metrics |
cvssV4_0
|
Subscriptions
No data.
Weaknesses
