CVE-2026-5102

MEDIUM

Totolink A3300R Parameter cstecgi.cgi setSmartQosCfg command injection

Title source: cna

Description

A security flaw has been discovered in Totolink A3300R 17.0.0cu.557_b20221024. This vulnerability affects the function setSmartQosCfg of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. The manipulation of the argument qos_up_bw results in command injection. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.

References (5)

[Product] https://www.totolink.net/

[Vdb Entry, Technical Description] https://vuldb.com/vuln/354127

[Signature, Permissions Required] https://vuldb.com/vuln/354127/cti

[Third Party Advisory] https://vuldb.com/submit/779129

[Exploit] https://github.com/Litengzheng/vul_db/blob/main/A3300R/vul_40/README.md

View Exploit ZIP pw:eip

Scores

CVSS v3 6.3

EPSS 0.0216

EPSS Percentile 84.4%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact partial

Details

CWE

CWE-74 CWE-77

Status published

Products (2)

Totolink/A3300R 17.0.0cu.557_b20221024

totolink/a3300r_firmware 17.0.0cu.557_b20221024

Published Mar 30, 2026

Tracked Since Mar 30, 2026