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CVE-2026-108473

High

Description

Multiple Kasa devices contain an improper authentication vulnerability in the local device-management protocol. An unauthenticated adjacent attacker may send management instructions to an affected device without adequate authentication or authorization, allowing modification of the device state or management settings. Under certain usage conditions involving interaction between the user, mobile application, and device-cloud service, insufficient protection of account-related communications may also expose account information. Successful exploitation may allow an unauthenticated adjacent-network attacker to perform unauthorized device-management actions and disrupt legitimate user control. Under certain conditions, account-related information may also be exposed, potentially leading to compromise of the associated cloud account.

SeverityHigh
CVSS8.7
Exploit probability—
ProductHS103 v5
PublishedOct 14, 2026
First seenOct 14, 2026
Weakness typeCWE-306Missing authentication for critical function

How to fix

Update
  • TP-Link Systems Inc. HS103 v51.1.3 Build 250908 Rel.112508 or later
  • TP-Link Systems Inc. EP10 v11.1.1 Build 250908 Rel.112508 or later
  • TP-Link Systems Inc. EP40 v11.1.0 Build 250225 Rel.171723 or later
  • TP-Link Systems Inc. HS200 v51.1.2 Build 241220 Rel.165559 or later
  • TP-Link Systems Inc. KP401 v11.1.2 Build 241223 Rel.094434 or later
  • TP-Link Systems Inc. KS230 KIT v21.1.4 Build 241223 Rel.105830 or later
  • TP-Link Systems Inc. KP405 v11.1.0 Build 250225 Rel.174632 or later
  • TP-Link Systems Inc. HS220 v31.1.4 Build 241220 Rel.171050 or later
  • TP-Link Systems Inc. KP115 v11.1.1 Build 250908 Rel.112945 or later
  • TP-Link Systems Inc. HS210 v31.1.0 Build 250225 Rel.163425 or later
  • TP-Link Systems Inc. HS300 v21.1.2 Build 241220 Rel.171333 or later
  • TP-Link Systems Inc. KP200 v31.1.0 Build 250225 Rel.171724 or later
Patches
Vendor advisories

Affected products

ProductAffected versionsFixed in
TP-Link Systems Inc. HS103 v5v < 1.1.3 Build 250908 Rel.1125081.1.3 Build 250908 Rel.112508
TP-Link Systems Inc. EP10 v1v < 1.1.1 Build 250908 Rel.1125081.1.1 Build 250908 Rel.112508
TP-Link Systems Inc. EP40 v1v < 1.1.0 Build 250225 Rel.1717231.1.0 Build 250225 Rel.171723
TP-Link Systems Inc. HS200 v5v < 1.1.2 Build 241220 Rel.1655591.1.2 Build 241220 Rel.165559
TP-Link Systems Inc. KP401 v1v < 1.1.2 Build 241223 Rel.0944341.1.2 Build 241223 Rel.094434
TP-Link Systems Inc. KS230 KIT v2v < 1.1.4 Build 241223 Rel.1058301.1.4 Build 241223 Rel.105830
TP-Link Systems Inc. KP405 v1v < 1.1.0 Build 250225 Rel.1746321.1.0 Build 250225 Rel.174632
TP-Link Systems Inc. HS220 v3v < 1.1.4 Build 241220 Rel.1710501.1.4 Build 241220 Rel.171050
TP-Link Systems Inc. KP115 v1v < 1.1.1 Build 250908 Rel.1129451.1.1 Build 250908 Rel.112945
TP-Link Systems Inc. HS210 v3v < 1.1.0 Build 250225 Rel.1634251.1.0 Build 250225 Rel.163425
TP-Link Systems Inc. HS300 v2v < 1.1.2 Build 241220 Rel.1713331.1.2 Build 241220 Rel.171333
TP-Link Systems Inc. KP200 v3v < 1.1.0 Build 250225 Rel.1717241.1.0 Build 250225 Rel.171724
TP-Link Systems Inc. KP303 v2v < 1.1.2 Build 241220 Rel.1733211.1.2 Build 241220 Rel.173321
TP-Link Systems Inc. KS200 v1v < 1.1.2 Build 241223 Rel.1038571.1.2 Build 241223 Rel.103857
TP-Link Systems Inc. EP40A v1v < 1.1.1 Build 250908 Rel.1125261.1.1 Build 250908 Rel.112526
TP-Link Systems Inc. KS220 v1v < 1.1.3 Build 241223 Rel.1055151.1.3 Build 241223 Rel.105515
TP-Link Systems Inc. KS200M v1v < 1.1.4 Build 241223 Rel.1047001.1.4 Build 241223 Rel.104700
TP-Link Systems Inc. ES20M v1v < 1.1.6 Build 250522 Rel.2102541.1.6 Build 250522 Rel.210254
TP-Link Systems Inc. KS220M v1v < 1.1.6 Build 250522 Rel.2102541.1.6 Build 250522 Rel.210254
TP-Link Systems Inc. KP400 v3v < 1.1.0 Build 250225 Rel.1717231.1.0 Build 250225 Rel.171723
TP-Link Systems Inc. KL125 v4v < 1.1.1 Build 260710 Rel.0826461.1.1 Build 260710 Rel.082646
TP-Link Systems Inc. KL135 v2v < 1.1.1 Build 260710 Rel.0826461.1.1 Build 260710 Rel.082646
TP-Link Systems Inc. KL110 v4v < 1.1.1 Build 260710 Rel.0826461.1.1 Build 260710 Rel.082646
TP-Link Systems Inc. KL420L5 v1v < 1.4.2 Build 260605 Rel.0350331.4.2 Build 260605 Rel.035033

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