RCE in Totolink A7100ru
CVE-2026-5691
A vulnerability has been found in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function setFirewallType of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument firewallType leads to os command injection. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.021 (80.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 80.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.021 · change: +0.009
Affected products
- Totolink A7100ru — versions 7.4cu.2313_b20191024
Weakness classification (CWE)
References
- vuldb.com/vuln/355518 (technical-description, vdb-entry)
- vuldb.com/vuln/355518/cti (signature, permissions-required)
- vuldb.com/submit/792962 (third-party-advisory)
- github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_189/README.md (exploit)
- www.totolink.net/ (product)
Frequently asked questions
- What is CVE-2026-5691?
- CVE-2026-5691 is a high-severity vulnerability in Totolink A7100ru, classified under Command Injection. CVSS score: 7.3/10. Published 2026-04-06.
- How severe is CVE-2026-5691?
- High severity. CVSS v3 base score is 7.3 out of 10.