Critical 9.8Published May 24, 2026

CVE-2026-9404Totolink A8000RU Web Management cstecgi.cgi setDdnsCfg os command injection

Updated under an hour ago (Oct 26, 2026, 2:00 AM ET)

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Every CVE for Totolink A8000RU

Exploited in the last 30 days

A vulnerability was identified in Totolink A8000RU 7.1cu.643_b20200521. This affects the function setDdnsCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Such manipulation of the argument provider leads to os command injection. The attack may be launched remotely. The exploit is publicly available and might be used.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
Weakness (CWE): CWE-78, CWE-77
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: May 29, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Totolink A8000RU totolink:a8000ru_firmware	7.1cu.643_b20200521	CNA record

References

https://vuldb.com/vuln/365385vdb-entry, technical-description
https://vuldb.com/vuln/365385/ctisignature, permissions-required
https://vuldb.com/submit/813439third-party-advisory
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_336/README.mdexploit
https://www.totolink.net/product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.