# CVE-2026-6241: TP-Link Tapo C520WS format string vulnerability in ONVIF AddScopes

Source: https://junglewise.ai/threats/cve-2026-6241-tp-link-tapo-c520ws-format-string-vulnerability-in-onvif-addscopes  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-06. Updated: 2026-06-06  
License: CC BY 4.0 with a link back

CVE-2026-6241 · Severity: info · CVSS 6.8 · Published 2026-06-06

A security vulnerability exists in the TP-Link Tapo C520WS outdoor security camera. An authorized user with high-level access can send a specially crafted command that causes the camera's management service to crash. This results in a denial-of-service, preventing the camera from being managed or operating normally until it is recovered.

Technologies: [TP-Link Tapo C520WS](https://junglewise.ai/threats/technologies/tapo-c520ws). Vendors: [TP-Link](https://junglewise.ai/threats/vendors/tp-link).

## Quick answers

**Is CVE-2026-6241 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-6241 being exploited in the wild.

**How severe is CVE-2026-6241?** Informational severity, with a CVSS score of 6.8, published 6 June 2026.

**Which products and versions are affected?** TP-Link Tapo C520WS v2.

**Is there a fix for CVE-2026-6241?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-6241 attacked?** It is attacked from the adjacent network, in a network appliance.

**Am I affected by CVE-2026-6241?** Check whether you run TP-Link Tapo C520WS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An authenticated format string vulnerability (CWE-134) exists in the ONVIF AddScopes method of the TP-Link Tapo C520WS v2. The vulnerability is caused by improperly passing user-controlled input from ONVIF scope parameters directly to formatting functions without adequate sanitization. An attacker with high privileges (PR:H) reachable via the adjacent network (AV:A) can inject format specifiers to manipulate memory handling. Successful exploitation leads to the termination of the ONVIF management service, resulting in a denial-of-service (DoS) condition affecting device operations.

## Affected products

- TP-Link Tapo C520WS v2

## Timeline

- 2026-06-05: disclosed
- 2026-06-06: advisory

## References

- [https://www.tp-link.com/en/support/download/tapo-c520ws/](https://www.tp-link.com/en/support/download/tapo-c520ws/)
- [https://www.tp-link.com/us/support/download/tapo-c520ws/](https://www.tp-link.com/us/support/download/tapo-c520ws/)
- [https://www.tp-link.com/us/support/faq/5120/](https://www.tp-link.com/us/support/faq/5120/)

## Related threats

- [TP-Link Tapo C520WS format string vulnerability in ONVIF Subscribe service](https://junglewise.ai/threats/cve-2026-6242-tp-link-tapo-c520ws-format-string-vulnerability-in-onvif-subscribe)
- [TP-Link Tapo C520WS stack overflow in ONVIF DeleteUsers service](https://junglewise.ai/threats/cve-2026-6240-tp-link-tapo-c520ws-stack-overflow-in-onvif-deleteusers-service)
- [TP-Link Tapo C520WS stack buffer overflow in ONVIF CreateUsers service](https://junglewise.ai/threats/cve-2026-6239-tp-link-tapo-c520ws-stack-buffer-overflow-in-onvif-createusers)
- [TP-Link Tapo C520WS auth bypass in API authorization mechanism](https://junglewise.ai/threats/cve-2026-34123-tp-link-tapo-c520ws-auth-bypass-in-api-authorization-mechanism)
- [TP-Link Tapo C520WS denial of service in RTSP server](https://junglewise.ai/threats/cve-2026-8714-tp-link-tapo-c520ws-denial-of-service-in-rtsp-server)