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CVE-2026-5101

Totolink A3300R Parameter cstecgi.cgi setLanCfg command injection

CVSS 5.3 MEDIUMEPSS 2.2%CWE-74CWE-77
Vexday Risk Score
33Attention
SSVC decision (CISA)
Attend
PoC available → attend closely
CVSS 5.3EPSS 2.2%KEV nãoPoC públicaNuclei —Metasploit —Patch —
Lifecycle
29 Mar 2026Published on NVD
Recommendation: Plan a near-term fix — a public PoC already exists.
A vulnerability was identified in Totolink A3300R 17.0.0cu.557_b20221024. This affects the function setLanCfg of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. The manipulation of the argument lanIp leads to command injection. Remote exploitation of the attack is possible. The exploit is publicly available and might 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/Litengzheng/vul_db/blob/main/A3300R/vul_39/README.mdunverified
⚠ 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/Litengzheng/vul_db/blob/main/A3300R/vul_39/README.mdhttps://vuldb.com/submit/779128https://vuldb.com/vuln/354126https://vuldb.com/vuln/354126/ctihttps://www.totolink.net/