Vulnerability · Published Apr 2, 2026 · Assigned by TPLink
CVE-2026-34124Denial of Service via Path Expansion Overflow in HTTP Service in TP-Link Tapo C520WS
High 7.1
In plain English
A high-severity buffer overflow in Tapo C520WS v2.6 from TP-Link Systems Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| TP-Link Systems Inc. | Tapo C520WS v2.6 | 0 – before 1.2.4 Build 260326 Rel.24666n |
Weakness: CWE-120 · Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N