Critical severity · published May 24, 2026
CVE-2026-9404
Totolink A8000RU Web Management cstecgi.cgi setDdnsCfg os command injection
9.8
CVSS
1.7%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.7% · higher than 78% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
A8
A8000RU · Totolink
7.1cu.643_b20200521 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-9404
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-9404
github.com
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_336/README.md
vuldb.com
https://vuldb.com/submit/813439
vuldb.com
https://vuldb.com/vuln/365385
vuldb.com
https://vuldb.com/vuln/365385/cti
www.totolink.net
https://www.totolink.net/
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