RCE in Totolink A8000ru
CVE-2026-9435
A vulnerability was detected in Totolink A8000RU 7.1cu.643_b20200521. The affected element is the function setQosCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Performing a manipulation of the argument enable results in os command injection. Remote exploitation of the attack is possible. The exploit is now public and may be used.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.033 (87.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.033 · change: +0.013
Affected products
- Totolink A8000ru — versions 7.1cu.643_b20200521
Weakness classification (CWE)
References
- vuldb.com/vuln/365416 (technical-description, vdb-entry)
- vuldb.com/vuln/365416/cti (signature, permissions-required)
- vuldb.com/submit/813908 (third-party-advisory)
- github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_356/README.md (exploit)
- www.totolink.net/ (product)
Frequently asked questions
- What is CVE-2026-9435?
- CVE-2026-9435 is a critical-severity vulnerability in Totolink A8000ru, classified under Command Injection. CVSS score: 9.8/10. Published 2026-05-25.
- How severe is CVE-2026-9435?
- Critical severity. CVSS v3 base score is 9.8 out of 10.