Is CVE-2026-6239 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-6239 being exploited in the wild.

How severe is CVE-2026-6239?

Informational severity, with a CVSS score of 6.8, published 6 June 2026.

Is there a fix for CVE-2026-6239?

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-2026-6239 attacked?

It is attacked from the adjacent network, in a network appliance.

Am I affected by CVE-2026-6239?

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.

CVE-2026-6239: TP-Link Tapo C520WS stack buffer overflow in ONVIF CreateUsers service

CVE-2026-6239 · Severity: info · CVSS 6.8 · Published 2026-06-06

The TP-Link Tapo C520WS is an outdoor security camera. A vulnerability in its user management service allows an authorized user to crash the device's management functions by sending a specially crafted request. This results in a denial-of-service condition, preventing the camera from being configured or managed until the service is restored.

Technologies: TP-Link Tapo C520WS. Vendors: TP-Link.

Quick answers

Is CVE-2026-6239 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-6239 being exploited in the wild.
How severe is CVE-2026-6239?: 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-2026-6239?: 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-2026-6239 attacked?: It is attacked from the adjacent network, in a network appliance.
Am I affected by CVE-2026-6239?: 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

A stack-based buffer overflow (CWE-121) exists in the ONVIF CreateUsers service of the TP-Link Tapo C520WS v2. The vulnerability is caused by a failure to properly validate the number of XML user nodes during request processing. An authenticated attacker with high privileges can exploit this by sending a specially crafted ONVIF request containing an excessive number of user entries. This triggers memory corruption, leading to the unexpected termination of the ONVIF management service and a subsequent denial-of-service (DoS) affecting device configuration and management. The attack vector is classified as 'Adjacent' (AV:A) per the vendor's CVSS 4.0 string.

Affected products

TP-Link Tapo C520WS v2

Timeline

2026-06-05: advisory: NVD and TP-Link published advisory details.
2026-06-06: disclosed

References

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