RCE in Totolink A3300r
CVE-2026-5101
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.035 (88.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.024 · newest: 0.035 · change: +0.012
Affected products
- Totolink A3300r — versions 17.0.0cu.557_b20221024
- Totolink A3300r Firmware — versions 17.0.0cu.557_b20221024
Weakness classification (CWE)
References
- vuldb.com/vuln/354126 (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/vuln/354126/cti (signature, permissions-required, VDB Entry, Third Party Advisory)
- vuldb.com/submit/779128 (Third Party Advisory, VDB Entry, third-party-advisory)
- github.com/Litengzheng/vul_db/blob/main/A3300R/vul_39/README.md (Exploit, Third Party Advisory, exploit)
- www.totolink.net/ (Product, product)
Frequently asked questions
- What is CVE-2026-5101?
- CVE-2026-5101 is a medium-severity vulnerability in Totolink A3300r, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.3/10. Published 2026-03-29.
- How severe is CVE-2026-5101?
- Medium severity. CVSS v3 base score is 6.3 out of 10.