CVE-2026-0918

HIGH

TP-Link Tapo C100 v5 C220 v1 C520WS v2 - Unauthenticated Denial of Service via Large Content-Length Header

Title source: llm
STIX 2.1

Description

The Tapo C100 v5, C220 v1 and C520WS v2 cameras’ HTTP service does not safely handle POST requests containing an excessively large Content-Length header. The resulting failed memory allocation triggers a NULL pointer dereference, causing the main service process to crash. An unauthenticated attacker can repeatedly crash the service, causing temporary denial of service. The device restarts automatically, and repeated requests can keep it unavailable.

References (7)

Core 7

Scores

CVSS v3 7.5
EPSS 0.0068
EPSS Percentile 47.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-476
Status published
Products (5)
tp-link/tapo_c220_firmware < 1.4.2
tp-link/tapo_c520ws_firmware < 1.2.3
TP-Link Systems Inc./Tapo C100 v5 < 1.4.3 Build 251128
TP-Link Systems Inc./Tapo C220 v1 < 1.4.2 Build 251112
TP-Link Systems Inc./Tapo C520WS v2 < 1.2.3 Build 251114
Published Jan 27, 2026
Tracked Since Feb 18, 2026