CVE-2025-70327

Critical

Description

TOTOLINK X5000R v9.1.0cu_2415_B20250515 contains an argument injection vulnerability in the setDiagnosisCfg handler of the /usr/sbin/lighttpd executable. The ip parameter is retrieved via websGetVar and passed to a ping command through CsteSystem without validating if the input starts with a hyphen (-). This allows remote authenticated attackers to inject arbitrary command-line options into the ping utility, potentially leading to a Denial of Service (DoS) by causing excessive resource consumption or prolonged execution.

SeverityCritical

CVSS9.8

Exploit probability—

ProductTotolink X5000r Firmware

PublishedFeb 23, 2026

First seenFeb 23, 2026

Weakness typeCWE-400Uncontrolled resource consumption

How to fix

Sources list no fixed version or patch link for this vulnerability.

Affected products

Product	Affected versions	Fixed in
totolink x5000r_firmware	9.1.0cu.2415_b20250515	—

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