CVE-2026-1623

Medium

Description

A weakness has been identified in Totolink A7000R 4.1cu.4154. Impacted is the function setUpgradeFW of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument FileName causes command injection. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.

SeverityMedium

CVSS6.3

Exploit probability—

ProductTotolink A7000r Firmware

PublishedJan 29, 2026

First seenJan 29, 2026

Weakness typeCWE-77Command injection CWE-74Injection

How to fix

Patches

github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/04_RCE_setUpgradeFW_RCE.md
github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/04_RCE_setUpgradeFW_RCE.md#poc

Affected products

Product	Affected versions	Fixed in
totolink a7000r_firmware	4.1cu.4154	—

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