RCE in Totolink A3300r
CVE-2026-5103
A weakness has been identified in Totolink A3300R 17.0.0cu.557_b20221024. This issue affects the function setUPnPCfg of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument enable causes command injection. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.
EPSS: 0.036 (88.4th percentile) — read the EPSS interpretation.
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.
Affected products
- Totolink A3300r — versions 17.0.0cu.557_b20221024
- Totolink A3300r_firmware — versions 17.0.0cu.557_b20221024
Weakness classification (CWE)
References
- cna@vuldb.com (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- cna@vuldb.com (signature, permissions-required, VDB Entry, Third Party Advisory)
- cna@vuldb.com (Permissions Required, VDB Entry, third-party-advisory)
- cna@vuldb.com (Exploit, Third Party Advisory, exploit)
- cna@vuldb.com (Product, product)
Frequently asked questions
- What is CVE-2026-5103?
- CVE-2026-5103 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 2026-03-30.
- How severe is CVE-2026-5103?
- Medium severity. CVSS v3 base score is 6.3 out of 10.