CVE-2026-5102 — MEDIUM (6.3)

Vulnerability 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.

CVSS Score

6.3

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

LOW

Affected Products

Vendor	Product	Versions
Totolink	A3300R Firmware	17.0.0cu.557_b20221024
Totolink	A3300R	-

Related Weaknesses (CWE)

CWE-74 CWE-77

References

https://github.com/Litengzheng/vul_db/blob/main/A3300R/vul_40/README.mdExploitThird Party Advisory
https://vuldb.com/submit/779129Permissions RequiredVDB Entry
https://vuldb.com/vuln/354127Third Party AdvisoryVDB Entry
https://vuldb.com/vuln/354127/ctiThird Party AdvisoryVDB Entry
https://www.totolink.net/Product

FAQ

What is CVE-2026-5102?

CVE-2026-5102 is a vulnerability with a CVSS score of 6.3 (MEDIUM). 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 Handle...

How severe is CVE-2026-5102?

CVE-2026-5102 has been rated MEDIUM with a CVSS base score of 6.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-5102?

Check the references section above for vendor advisories and patch information. Affected products include: Totolink A3300R Firmware, Totolink A3300R.