CVE-2026-6158

High

Description

A flaw has been found in Totolink N300RH 6.1c.1353_B20190305. Affected is the function setUpgradeUboot of the file upgrade.so. This manipulation of the argument FileName causes os command injection. The attack is possible to be carried out remotely. The exploit has been published and may be used.

SeverityHigh

CVSS7.3

Exploit probability—

ProductTotolink N300rh Firmware

PublishedApr 13, 2026

First seenApr 13, 2026

Weakness typeCWE-78OS command injection CWE-77Command injection

How to fix

Patches

github.com/xyh4ck/iot_poc/tree/main/TOTOLINK/N300RHv4/02_setUpgradeUboot_RCE

Affected products

Product	Affected versions	Fixed in
totolink n300rh_firmware	6.1c.1353_B20190305	—

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