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CVE-2026-5105

Totolink A3300R Parameter cstecgi.cgi setVpnPassCfg command injection

CVSS 5.3 MEDIUMEPSS 3.7%CWE-74CWE-77
Vexday Risk Score
33Attention
SSVC decision (CISA)
Attend
PoC available → attend closely
CVSS 5.3EPSS 3.7%KEV nãoPoC públicaPatch —
Lifecycle
30 Mar 2026Published on NVD
Recommendation: Plan a near-term fix — a public PoC already exists.
A vulnerability was detected in Totolink A3300R 17.0.0cu.557_b20221024. The affected element is the function setVpnPassCfg of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. Performing a manipulation of the argument pptpPassThru results in command injection. It is possible to initiate the attack remotely. The exploit is now public and may be used.
CVSS: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
Affected products
Totolink · A3300R
public PoCs found — 1
cve_referencegithub.com/LvHongW/Vuln-of-totolink_A3300R/tree/main/A3300R_pptpPassThru_cmd_injectunverified
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References
https://github.com/LvHongW/Vuln-of-totolink_A3300R/tree/main/A3300R_pptpPassThru_cmd_injecthttps://vuldb.com/submit/779143https://vuldb.com/vuln/354130https://vuldb.com/vuln/354130/ctihttps://www.totolink.net/