Critical severity · published May 25, 2026
CVE-2026-9435
Totolink A8000RU Web Management cstecgi.cgi setQosCfg os command injection
9.8
CVSS
1.9%
EPSS
No
On KEV
Description
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.
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)1.9% · higher than 80% 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-2026-9435
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-9435
github.com
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_356/README.md
vuldb.com
https://vuldb.com/submit/813908
vuldb.com
https://vuldb.com/vuln/365416
vuldb.com
https://vuldb.com/vuln/365416/cti
www.totolink.net
https://www.totolink.net/
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