CVE-2025-67445

HIGH

TOTOLINK X5000R V9.1.0cu.2415_B20250515 - DoS

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2025-67445. PoCs published by DaRkSpOoOk.

AI-analyzed exploit summary The repository contains a functional Python PoC that exploits a DoS vulnerability in TOTOLINK X5000R V9.1.0cu.2415 by sending oversized HTTP POST requests to the CGI endpoint, causing memory exhaustion and a segmentation fault. The exploit leverages the lack of request size enforcement in the Lighttpd configuration.

Description

TOTOLINK X5000R V9.1.0cu.2415_B20250515 contains a denial-of-service vulnerability in /cgi-bin/cstecgi.cgi. The CGI reads the CONTENT_LENGTH environment variable and allocates memory using malloc (CONTENT_LENGTH + 1) without sufficient bounds checking. When lighttpd s request size limit is not enforced, a crafted large POST request can cause memory exhaustion or a segmentation fault, leading to a crash of the management CGI and loss of availability of the web interface.

Exploits (1)

nomisec WORKING POC
by DaRkSpOoOk · poc
https://github.com/DaRkSpOoOk/CVE-2025-67445

The repository contains a functional Python PoC that exploits a DoS vulnerability in TOTOLINK X5000R V9.1.0cu.2415 by sending oversized HTTP POST requests to the CGI endpoint, causing memory exhaustion and a segmentation fault. The exploit leverages the lack of request size enforcement in the Lighttpd configuration.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: TOTOLINK X5000R V9.1.0cu.2415
No auth needed
Prerequisites: LAN access to the target device
devstral-2 · analyzed May 04, 2026 Full analysis →

References (2)

Core 2
Core References
Various Sources
http://totolink.com

Scores

CVSS v3 7.5
EPSS 0.0035
EPSS Percentile 26.9%
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-400
Status published
Products (1)
totolink/x5000r_firmware 9.1.0cu.2415_b20250515
Published Feb 24, 2026
Tracked Since Feb 24, 2026