RCE in Totolink A7100ru
CVE-2026-5688
A security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. Impacted is the function setDdnsCfg of the file /cgi-bin/cstecgi.cgi. Such manipulation of the argument provider leads to os command injection. The attack may be launched remotely. The exploit has been disclosed publicly 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: 0.014 · newest: 0.021 · change: +0.007
Affected products
- Totolink A7100ru — versions 7.4cu.2313_b20191024
Weakness classification (CWE)
References
- vuldb.com/vuln/355515 (technical-description, vdb-entry)
- vuldb.com/vuln/355515/cti (signature, permissions-required)
- vuldb.com/submit/792945 (third-party-advisory)
- github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_186/README.md (exploit)
- www.totolink.net/ (product)
Frequently asked questions
- What is CVE-2026-5688?
- CVE-2026-5688 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-2026-5688?
- High severity. CVSS v3 base score is 7.3 out of 10.