What’s Vulnerable › Vulnerabilities

CVE-2026-34124: Denial of Service via Path Expansion Overflow in HTTP Service in TP-Link Tapo C520WS

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-02 · updated 2026-07-24
• Weakness: CWE-120

Description

A denial-of-service vulnerability was identified in TP-Link Tapo C520WS v2.6 within the HTTP request path parsing logic. The implementation enforces length restrictions on the raw request path but does not account for path expansion performed during normalization. An attacker on the adjacent network may send a crafted HTTP request to cause buffer overflow and memory corruption, leading to system interruption or device reboot.

Affected products

• TP-Link Systems Inc. Tapo C520WS v2: before 1.2.4 — fixed in 1.2.4

How to fix

Upgrade to a fixed version: TP-Link Systems Inc. Tapo C520WS v2 1.2.4. Check the vendor advisory for mitigations.

References

• https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes
• https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes
• https://www.tp-link.com/us/support/faq/5047/

Get alerted when CVE-2026-34124 or the next vulnerability affects your stack