CVE-2026-5101: Totolink A3300R Parameter cstecgi.cgi setLanCfg command injection

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-03-29 · updated 2026-06-17
Weakness: CWE-74

Description

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.

Affected products

Totolink A3300R: 17.0.0cu.557_b20221024

References

https://github.com/Litengzheng/vul_db/blob/main/A3300R/vul_39/README.md
https://vuldb.com/submit/779128
https://vuldb.com/vuln/354126
https://vuldb.com/vuln/354126/cti
https://www.totolink.net/

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