CVE-2026-34122

A stack-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within a configuration handling component due to insufficient input validation. An attacker can exploit this vulnerability by supplying an excessively long value for a vulnerable configuration parameter, resulting in a stack overflow. Successful exploitation results in Denial-of-Service (DoS) condition, leading to a service crash or device reboot, impacting availability.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes	Release Notes
https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes	Release Notes
https://www.tp-link.com/us/support/faq/5047/	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:tp-link:tapo_c520ws_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:tp-link:tapo_c520ws:2.6:*:*:*:*:*:*:*

History

06 Apr 2026, 20:23

Type	Values Removed	Values Added
References	~~() https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes -~~	() https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes - Release Notes
References	~~() https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes -~~	() https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes - Release Notes
References	~~() https://www.tp-link.com/us/support/faq/5047/ -~~	() https://www.tp-link.com/us/support/faq/5047/ - Vendor Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.5
First Time		Tp-link tapo C520ws Firmware Tp-link Tp-link tapo C520ws
CPE		cpe:2.3:o:tp-link:tapo_c520ws_firmware:::::::: cpe:2.3:h:tp-link:tapo_c520ws:2.6:::::::*

02 Apr 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-02 18:16

Updated : 2026-04-06 20:23

NVD link : CVE-2026-34122

Mitre link : CVE-2026-34122

CVE.ORG link : CVE-2026-34122

JSON object : View

Products Affected

tp-link

tapo_c520ws_firmware
tapo_c520ws

CWE

CWE-121

Stack-based Buffer Overflow

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