CVE-2026-109506 (GCVE-0-2026-109506)

Vulnerability from cvelistv5 – Published: 2026-10-14 18:31 – Updated: 2026-10-15 19:33
VLAI
Title
Improper Authentication in Multiple TP-Link WiFi Repeaters
Summary
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.
Severity
5.9 (Medium)
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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 19:33 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
TPLink CNA under the mitre root
CNA scorecard B 87/100 over 110 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
TP-Link Systems Inc. RE190 v5 Affected: 0 , < V5_260904 (custom)
guessed Create a notification for this product.
TP-Link Systems Inc. RE200 v5 Affected: 0 , < V5_260904 (custom)
guessed Create a notification for this product.
TP-Link Systems Inc. RE205 v4 Affected: 0 , < V4_260904 (custom)
guessed Create a notification for this product.
TP-Link Systems Inc. RE215 v1 Affected: 0 , < V1_260904 (custom)
guessed Create a notification for this product.
TP-Link Systems Inc. RE220 v3 Affected: 0 , < V3_260904 (custom)
guessed Create a notification for this product.
TP-Link Systems Inc. RE230 v2 Affected: 0 , < V2_260904 (custom)
guessed Create a notification for this product.
TP-Link Systems Inc. RE300 v2 Affected: 0 , < V2_260904 (custom)
guessed Create a notification for this product.
TP-Link Systems Inc. RE305 v4 Affected: 0 , < V4_260904 (custom)
guessed Create a notification for this product.
TP-Link Systems Inc. RE330 v1 Affected: 0 , < V1_260904 (custom)
guessed Create a notification for this product.
TP-Link Systems Inc. RE335 v1 Affected: 0 , < V1_260904 (custom)
guessed Create a notification for this product.
TP-Link Systems Inc. RE365 v2 Affected: 0 , < V2_260904 (custom)
guessed Create a notification for this product.
TP-Link Systems Inc. RE365 v3 Affected: 0 , < V3_260904 (custom)
guessed Create a notification for this product.
TP-Link Systems Inc. RE750C v4 Affected: 0 , < V4_260904 (custom)
guessed Create a notification for this product.
TP-Link Systems Inc. RE450 v4.8 Affected: 0 , < V4_260915 (custom)
guessed Create a notification for this product.
TP-Link Systems Inc. RE550 v1 Affected: 0 , < V1_260915 (custom)
guessed Create a notification for this product.
TP-Link Systems Inc. RE315 v1 Affected: 0 , < V1_260904 rel3959 (custom)
guessed Create a notification for this product.
Credits
Lukas Palm
Show details on NVD website
To clipboard 

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    "vulnrichment": {
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              {
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                    "id": "CVE-2026-109506",
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                      },
                      {
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                      {
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              "shortName": "CISA-ADP"
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        "dateReserved": "2026-10-12T17:19:32.357Z",
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  }
}



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Tags
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.