All vulnerabilities
CVE-2026-109506

RE190 v5: Improper Authentication in Multiple TP-Link WiFi Repeaters

TP-Link Systems Inc. RE190 v5Network & edge
Open in ThreatlineRecord JSON
CVSS
5.9Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.35%Chance of exploitation activity in the next 30 days, higher than 26% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published14 Oct 2026Updated 15 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

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.

Text from CVE List

Affected versions 16

  • RE190 v5affected: all versions before V5_260904CVE List
  • RE200 v5affected: all versions before V5_260904CVE List
  • RE205 v4affected: all versions before V4_260904CVE List
  • RE215 v1affected: all versions before V1_260904CVE List
  • RE220 v3affected: all versions before V3_260904CVE List
  • RE230 v2affected: all versions before V2_260904CVE List
  • RE300 v2affected: all versions before V2_260904CVE List
  • RE305 v4affected: all versions before V4_260904CVE List
  • RE330 v1affected: all versions before V1_260904CVE List
  • RE335 v1affected: all versions before V1_260904CVE List
  • RE365 v2affected: all versions before V2_260904CVE List
  • RE365 v3affected: all versions before V3_260904CVE List
  • RE750C v4affected: all versions before V4_260904CVE List
  • RE450 v4.8affected: all versions before V4_260915CVE List
  • RE550 v1affected: all versions before V1_260915CVE List
  • RE315 v1affected: all versions before V1_260904 rel3959CVE List

References 3