Vulnerability Description
A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 in the HTTP POST body parsing logic due to missing validation of remaining buffer capacity after dynamic allocation, due to insufficient boundary validation when handling externally supplied HTTP input. An attacker on the same network segment could trigger heap memory corruption conditions by sending crafted payloads that cause write operations beyond allocated buffer boundaries. Successful exploitation causes a Denial-of-Service (DoS) condition, causing the device’s process to crash or become unresponsive.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Tp-Link | Tapo C520Ws Firmware | < 1.2.4 |
| Tp-Link | Tapo C520Ws | 2.6 |
Related Weaknesses (CWE)
References
- https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-NotesRelease Notes
- https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-NotesRelease Notes
- https://www.tp-link.com/us/support/faq/5047/Vendor Advisory
FAQ
What is CVE-2026-34118?
CVE-2026-34118 is a vulnerability with a CVSS score of 6.5 (MEDIUM). A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 in the HTTP POST body parsing logic due to missing validation of remaining buffer capacity after dynamic allocatio...
How severe is CVE-2026-34118?
CVE-2026-34118 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-34118?
Check the references section above for vendor advisories and patch information. Affected products include: Tp-Link Tapo C520Ws Firmware, Tp-Link Tapo C520Ws.