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OpenAdvisories
High · 8.7 CVE-2026-76784 EUVD-2026-66641GHSA-pfwg-rgvf-86xw

Insufficient Cryptographic Protections in Local Device Communication Protocol on Multiple TP-Link Kasa Smart Home Devices

Published Aug 26, 2026 · Updated Aug 26, 2026 · Assigned by TPLink

Vendor: TP-Link Systems Product: EP10 Product: EP25 V2 Product: EP40A Product: EP40M Product: ES20M Product: HS103P3 / HS103P4 v5 Product: HS200 V5.26 Product: HS220 V3.26 Product: HS220-LA(US) 4.6 / HS220-BL(US) 4.6 Product: HS220-LA(US) 6.6 / HS220-BL(US) 6.6 Product: HS300 V2 Product: KL125 Product: KP115 Product: KP125MP2 / KP125MP4 Product: KP200 V3 Product: KP303 V2 Product: KS205 Product: KS220M Product: KS225 Product: KS240 Category: Network devices

Description

Multiple
TP-Link Kasa smart home devices contain insufficient cryptographic protections
in the local device communication protocol. An adjacent network attacker may
intercept, replay or forge locally exchanged control messages, potentially
resulting in unauthorized device control.

Successful
exploitation could allow an attacker to manipulate the operational state of an
affected device, resulting in unauthorized state changes, disruption of normal
device functionality or a denial-of-service condition.

Affected products

VendorProductAffectedFixed
TP-Link Systems HS103P3 / HS103P4 v5 < 1.1.3 Build 250908 Rel.112508 1.1.3 Build 250908 Rel.112508
TP-Link Systems EP10 < 1.1.1 Build 250908 Rel.112508 1.1.1 Build 250908 Rel.112508
TP-Link Systems EP25 V2 < 1.0.3 Build 240529 Rel.145252 1.0.3 Build 240529 Rel.145252
TP-Link Systems HS300 V2 < 1.1.2 Build 241220 Rel.171333 1.1.2 Build 241220 Rel.171333
TP-Link Systems KP303 V2 < 1.1.2 Build 241220 Rel.173321 1.1.2 Build 241220 Rel.173321
TP-Link Systems EP40A < 1.1.1 Build 250908 Rel.112526 1.1.1 Build 250908 Rel.112526
TP-Link Systems KP125MP2 / KP125MP4 < 1.2.5 Build 241213 Rel.172504 1.2.5 Build 241213 Rel.172504
TP-Link Systems KP115 < 1.1.1 Build 250908 Rel.112945 1.1.1 Build 250908 Rel.112945
TP-Link Systems KS225 < 1.1.1 Build 240626 Rel.175125 1.1.1 Build 240626 Rel.175125
TP-Link Systems EP40M < 1.1.0 Build 240415 Rel.171219 1.1.0 Build 240415 Rel.171219
TP-Link Systems KS205 < 1.1.1 Build 240724 Rel.105920 1.1.1 Build 240724 Rel.105920
TP-Link Systems KS240 < 1.0.6 Build 240122 Rel.160100 1.0.6 Build 240122 Rel.160100
TP-Link Systems ES20M < 1.1.6 Build 250522 Rel.210254 1.1.6 Build 250522 Rel.210254
TP-Link Systems KS220M < 1.1.6 Build 250522 Rel.210254 1.1.6 Build 250522 Rel.210254
TP-Link Systems KP200 V3 < 1.1.0 Build 250225 Rel.171724 1.1.0 Build 250225 Rel.171724
TP-Link Systems HS200 V5.26 < 1.0.3 Build 240723 Rel.192622 1.0.3 Build 240723 Rel.192622
TP-Link Systems HS220-LA(US) 6.6 / HS220-BL(US) 6.6 < 1.0.3 Build 240723 Rel.192630 1.0.3 Build 240723 Rel.192630
TP-Link Systems HS220 V3.26 < 1.1.1 Build 240802 Rel.094131 1.1.1 Build 240802 Rel.094131
TP-Link Systems HS220-LA(US) 4.6 / HS220-BL(US) 4.6 < 1.1.1 Build 240802 Rel.094142 1.1.1 Build 240802 Rel.094142
TP-Link Systems KL125 < 1.1.1 Build 260710 Rel.082646 1.1.1 Build 260710 Rel.082646

References