TP-Link Tapo C520WS v2 ONVIF AddScopes format string

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.9$0-$5k2.42-

Summaryinfo

A vulnerability identified as critical has been detected in TP-Link Tapo C520WS v2. Affected is an unknown function of the component ONVIF AddScopes. This manipulation causes format string. The identification of this vulnerability is CVE-2026-6241. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in TP-Link Tapo C520WS v2 (affected version not known) and classified as critical. Affected by this vulnerability is some unknown functionality of the component ONVIF AddScopes. The manipulation with an unknown input leads to a format string vulnerability. The CWE definition for the vulnerability is CWE-134. The product uses a function that accepts a format string as an argument, but the format string originates from an external source. As an impact it is known to affect availability. The summary by CVE is:

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.

The advisory is shared at tp-link.com. This vulnerability is known as CVE-2026-6241 since 04/13/2026. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/06/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

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License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.9

VulDB Base Score: 4.9
VulDB Temp Score: 4.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Format string
CWE: CWE-134 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/13/2026 CVE reserved
06/06/2026 +54 days Advisory disclosed
06/06/2026 +0 days VulDB entry created
06/06/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: tp-link.com

Advisory: tp-link.com
Status: Confirmed

CVE: CVE-2026-6241 (🔒)
GCVE (CVE): GCVE-0-2026-6241
GCVE (VulDB): GCVE-100-369049

Entryinfo

Created: 06/06/2026 09:11
Changes: 06/06/2026 09:11 (64)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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