Quick answers
- Is CVE-2026-6242 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-6242 being exploited in the wild.
- How severe is CVE-2026-6242?
- 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-2026-6242?
- 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-2026-6242 attacked?
- It is attacked from the adjacent network, in a network appliance.
- Am I affected by CVE-2026-6242?
- 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 Subscribe service of the TP-Link Tapo C520WS v2. The flaw is caused by improper handling of externally supplied parameters within formatting functions during the processing of event subscription requests or notification generation. An attacker with high privileges can inject crafted format specifiers into these requests to trigger a service crash. Successful exploitation results in the termination of the event notification service, leading to a loss of real-time alarm functionality. The vulnerability is reachable via the adjacent network.
Affected products
- TP-Link Tapo C520WS v2
Timeline
- 2026-06-06: advisory: TP-Link and NVD published the advisory.