CVE-2026-5102

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
Link Resource
https://github.com/Litengzheng/vul_db/blob/main/A3300R/vul_40/README.md Exploit Third Party Advisory
https://vuldb.com/submit/779129 Permissions Required VDB Entry
https://vuldb.com/vuln/354127 Third Party Advisory VDB Entry
https://vuldb.com/vuln/354127/cti Third Party Advisory VDB Entry
https://www.totolink.net/ Product
Configurations

Configuration 1 (hide)

AND
cpe:2.3:o:totolink:a3300r_firmware:17.0.0cu.557_b20221024:*:*:*:*:*:*:*
cpe:2.3:h:totolink:a3300r:-:*:*:*:*:*:*:*

History

29 Apr 2026, 01:00

Type Values Removed Values Added
Summary
  • (es) Se ha descubierto una vulnerabilidad en Totolink A3300R 17.0.0cu.557_b20221024. Esta vulnerabilidad afecta a la función setSmartQosCfg del archivo /cgi-bin/cstecgi.cgi del componente Gestor de Parámetros. La manipulación del argumento qos_up_bw resulta en inyección de comandos. El ataque puede ser ejecutado remotamente. El exploit ha sido publicado y puede ser utilizado para ataques.

30 Mar 2026, 15:49

Type Values Removed Values Added
References () https://github.com/Litengzheng/vul_db/blob/main/A3300R/vul_40/README.md - () https://github.com/Litengzheng/vul_db/blob/main/A3300R/vul_40/README.md - Exploit, Third Party Advisory
References () https://vuldb.com/submit/779129 - () https://vuldb.com/submit/779129 - Permissions Required, VDB Entry
References () https://vuldb.com/vuln/354127 - () https://vuldb.com/vuln/354127 - Third Party Advisory, VDB Entry
References () https://vuldb.com/vuln/354127/cti - () https://vuldb.com/vuln/354127/cti - Third Party Advisory, VDB Entry
References () https://www.totolink.net/ - () https://www.totolink.net/ - Product
First Time Totolink a3300r
Totolink a3300r Firmware
Totolink
CPE cpe:2.3:o:totolink:a3300r_firmware:17.0.0cu.557_b20221024:*:*:*:*:*:*:*
cpe:2.3:h:totolink:a3300r:-:*:*:*:*:*:*:*

30 Mar 2026, 00:16

Type Values Removed Values Added
New CVE

Information

Published : 2026-03-30 00:16

Updated : 2026-04-29 01:00


NVD link : CVE-2026-5102

Mitre link : CVE-2026-5102

CVE.ORG link : CVE-2026-5102


JSON object : View

Products Affected

totolink

  • a3300r
  • a3300r_firmware
CWE
CWE-74

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

CWE-77

Improper Neutralization of Special Elements used in a Command ('Command Injection')