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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.

PUBLISHED Reserved 2026-03-29 | Published 2026-03-30 | Updated 2026-03-30 | Assigner VulDB




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
MEDIUM: 6.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
MEDIUM: 6.3CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
6.5AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR

Problem types

Command Injection

Injection

Product status

17.0.0cu.557_b20221024
affected

Timeline

2026-03-29:Advisory disclosed
2026-03-29:VulDB entry created
2026-03-29:VulDB entry last update

Credits

LtzHuster2 (VulDB User) reporter

References

vuldb.com/vuln/354127 (VDB-354127 | Totolink A3300R Parameter cstecgi.cgi setSmartQosCfg command injection) vdb-entry technical-description

vuldb.com/vuln/354127/cti (VDB-354127 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/submit/779129 (Submit #779129 | Totolink A3300R 17.0.0cu.557_b20221024 Command Injection) third-party-advisory

github.com/...zheng/vul_db/blob/main/A3300R/vul_40/README.md exploit

www.totolink.net/ product

cve.org (CVE-2026-5102)

nvd.nist.gov (CVE-2026-5102)

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