Vulnerability · Published Jun 5, 2026 · Assigned by TPLink

CVE-2026-6241Authenticated Format String Vulnerability in ONVIF AddScopes Method on TP-Link Tapo C520WS

Medium 6.8

In plain English

A medium-severity security flaw in Tapo C520WS v2 from TP-Link Systems Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities).

Severity (CVSS 4.0)6.8Medium

Exploit odds (30 days)0.2%top 94.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

An authenticated format string vulnerability is present in the ONVIF AddScopes in Tapo C520WS v2, where user-controlled input is improperly passed to formatting functions without adequate sanitization. An attacker can inject format specifiers into ONVIF scope parameters to manipulate memory handling behavior. Successful exploitation may cause the ONVIF management service to crash, resulting in DoS condition that impacts normal device operation.

Affected products (as reported)

Vendor	Product	Versions
TP-Link Systems Inc.	Tapo C520WS v2	0 – before 1.2.6 Build 260528

Weakness: CWE-134 · Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

In plain English

Official description

Affected products (as reported)

References