CVE-2026-76784

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TP-Link Kasa Smart Home Devices Cryptographic Protocol Weakness

Publication date: 2026-08-26

Last updated on: 2026-08-28

Assigner: TPLink

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.

CVSS Scores

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Meta Information

Published

2026-08-26

Last Modified

2026-08-28

Generated

2026-09-16

AI Q&A

2026-08-26

EPSS Evaluated

2026-09-14

NVD

CVE-2026-76784

EUVD

EUVD-2026-66641

Affected Vendors & Products

Vendor	Product	Version / Range
tp-link	kasa	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-325	The product does not implement a required step in a cryptographic algorithm, resulting in weaker encryption than advertised by the algorithm.

Attack-Flow Graph

Executive Summary

CVE-2026-76784 is a vulnerability in TP-Link Kasa smart home devices caused by weak cryptographic protections in their local communication protocol. An attacker within close proximity to the network can intercept, replay, or forge control messages to gain unauthorized access to devices.

Detection Guidance

Detection requires monitoring network traffic for unencrypted or weakly encrypted local device communications. Use packet capture tools like Wireshark to inspect traffic between TP-Link Kasa devices and your network. Look for plaintext control messages or repeated patterns indicating replay attacks. Check device firmware versions against TP-Link's advisory for known vulnerable releases.

Impact Analysis

This vulnerability may allow an attacker to manipulate device states, disrupt normal functionality, or cause a denial-of-service. Unauthorized control could lead to privacy risks, physical damage, or loss of device availability.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by exposing sensitive data or enabling unauthorized control of devices. Insufficient cryptographic protections may allow attackers to intercept or manipulate device communications, leading to unauthorized access or data breaches. This could violate privacy requirements under GDPR and compromise protected health information under HIPAA.

Mitigation Strategies

Immediately update all TP-Link Kasa devices to the latest firmware versions provided by TP-Link. Isolate affected devices on a separate network segment if possible. Disable remote access features if not required. Monitor device behavior for unauthorized changes and restrict physical access to network infrastructure.

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