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CVE-2026-76784— Insufficient Cryptographic Protections in Local Device Communication Protocol on Multiple TP-Link Kasa Smart Home Devices

Quick assessment

Affected
TP-Link Systems Inc. HS103P3 / HS103P4 v5
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TP-Link HS103P3 / HS103P4 v5是中国TP-Link公司的一款智能插座。 TP-Link HS103P3 / HS103P4 v5 1.1.3 Build 250908 Rel.112508之前版本存在加密问题漏洞，该漏洞源于本地设备通信协议加密保护不足，可能导致相邻网络攻击者拦截、重放或伪造本地交换的控制消息，进而未经授权控制设备，造成未授权状态更改、功能中断或拒绝服务。

CVSS 8.7 · High EPSS 0.20% · P9

Affected Version Matrix 20

VendorProduct Version RangeStatus
TP-Link Systems Inc. EP10 < 1.1.1 Build 250908 Rel.112508 affected
TP-Link Systems Inc. EP25 V2 < 1.0.3 Build 240529 Rel.145252 affected
TP-Link Systems Inc. EP40A < 1.1.1 Build 250908 Rel.112526 affected
TP-Link Systems Inc. EP40M < 1.1.0 Build 240415 Rel.171219 affected
TP-Link Systems Inc. ES20M < 1.1.6 Build 250522 Rel.210254 affected
TP-Link Systems Inc. HS103P3 / HS103P4 v5 < 1.1.3 Build 250908 Rel.112508 affected
TP-Link Systems Inc. HS200 V5.26 < 1.0.3 Build 240723 Rel.192622 affected
TP-Link Systems Inc. HS220 V3.26 < 1.1.1 Build 240802 Rel.094131 affected
TP-Link Systems Inc. HS220-LA(US) 4.6 / HS220-BL(US) 4.6 < 1.1.1 Build 240802 Rel.094142 affected
TP-Link Systems Inc. HS220-LA(US) 6.6 / HS220-BL(US) 6.6 < 1.0.3 Build 240723 Rel.192630 affected
TP-Link Systems Inc. HS300 V2 < 1.1.2 Build 241220 Rel.171333 affected
TP-Link Systems Inc. KL125 < 1.1.1 Build 260710 Rel.082646 affected
TP-Link Systems Inc. KP115 < 1.1.1 Build 250908 Rel.112945 affected
TP-Link Systems Inc. KP125MP2 / KP125MP4 < 1.2.5 Build 241213 Rel.172504 affected
TP-Link Systems Inc. KP200 V3 < 1.1.0 Build 250225 Rel.171724 affected
TP-Link Systems Inc. KP303 V2 < 1.1.2 Build 241220 Rel.173321 affected
TP-Link Systems Inc. KS205 < 1.1.1 Build 240724 Rel.105920 affected
TP-Link Systems Inc. KS220M < 1.1.6 Build 250522 Rel.210254 affected
TP-Link Systems Inc. KS225 < 1.1.1 Build 240626 Rel.175125 affected
TP-Link Systems Inc. KS240 < 1.0.6 Build 240122 Rel.160100 affected
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I. Basic Information for CVE-2026-76784

Vulnerability Information
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Vulnerability Title
Insufficient Cryptographic Protections in Local Device Communication Protocol on Multiple TP-Link Kasa Smart Home Devices
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
缺少必要的密码学步骤
Source: CVE Program / CVE List V5
Vulnerability Title
TP-Link HS103P3 / HS103P4 v5 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TP-Link HS103P3 / HS103P4 v5是中国TP-Link公司的一款智能插座。 TP-Link HS103P3 / HS103P4 v5 1.1.3 Build 250908 Rel.112508之前版本存在加密问题漏洞，该漏洞源于本地设备通信协议加密保护不足，可能导致相邻网络攻击者拦截、重放或伪造本地交换的控制消息，进而未经授权控制设备，造成未授权状态更改、功能中断或拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
TP-Link Systems Inc. HS103P3 / HS103P4 v5 0 ~ 1.1.3 Build 250908 Rel.112508 -
TP-Link Systems Inc. EP10 0 ~ 1.1.1 Build 250908 Rel.112508 -
TP-Link Systems Inc. EP25 V2 0 ~ 1.0.3 Build 240529 Rel.145252 -
TP-Link Systems Inc. HS300 V2 0 ~ 1.1.2 Build 241220 Rel.171333 -
TP-Link Systems Inc. KP303 V2 0 ~ 1.1.2 Build 241220 Rel.173321 -
TP-Link Systems Inc. EP40A 0 ~ 1.1.1 Build 250908 Rel.112526 -
TP-Link Systems Inc. KP125MP2 / KP125MP4 0 ~ 1.2.5 Build 241213 Rel.172504 -
TP-Link Systems Inc. KP115 0 ~ 1.1.1 Build 250908 Rel.112945 -
TP-Link Systems Inc. KS225 0 ~ 1.1.1 Build 240626 Rel.175125 -
TP-Link Systems Inc. EP40M 0 ~ 1.1.0 Build 240415 Rel.171219 -
TP-Link Systems Inc. KS205 0 ~ 1.1.1 Build 240724 Rel.105920 -
TP-Link Systems Inc. KS240 0 ~ 1.0.6 Build 240122 Rel.160100 -
TP-Link Systems Inc. ES20M 0 ~ 1.1.6 Build 250522 Rel.210254 -
TP-Link Systems Inc. KS220M 0 ~ 1.1.6 Build 250522 Rel.210254 -
TP-Link Systems Inc. KP200 V3 0 ~ 1.1.0 Build 250225 Rel.171724 -
TP-Link Systems Inc. HS200 V5.26 0 ~ 1.0.3 Build 240723 Rel.192622 -
TP-Link Systems Inc. HS220-LA(US) 6.6 / HS220-BL(US) 6.6 0 ~ 1.0.3 Build 240723 Rel.192630 -
TP-Link Systems Inc. HS220 V3.26 0 ~ 1.1.1 Build 240802 Rel.094131 -
TP-Link Systems Inc. HS220-LA(US) 4.6 / HS220-BL(US) 4.6 0 ~ 1.1.1 Build 240802 Rel.094142 -
TP-Link Systems Inc. KL125 0 ~ 1.1.1 Build 260710 Rel.082646 -

II. Public POCs for CVE-2026-76784

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III. Intelligence Information for CVE-2026-76784

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Vendor Advisories for CVE-2026-76784 (1)

Vendor Pages for CVE-2026-76784 (3)

IV. Related Vulnerabilities

Same vendor: TP-Link Systems Inc.
Same weakness: CWE-325

V. Comments for CVE-2026-76784

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