Critical severity · published Apr 27, 2026
CVE-2026-7140
Totolink A8000RU CGI cstecgi.cgi CsteSystem os command injection
9.8
CVSS
1.8%
EPSS
No
On KEV
Description
A vulnerability has been found in Totolink A8000RU 7.1cu.643_b20200521. Impacted is the function CsteSystem of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument HTTP leads to os command injection. The attack may be performed from remote. The exploit has been disclosed to the 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)1.8% · 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-2026-7140
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-7140
github.com
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_315/README.md
vuldb.com
https://vuldb.com/submit/801110
vuldb.com
https://vuldb.com/vuln/359739
vuldb.com
https://vuldb.com/vuln/359739/cti
www.totolink.net
https://www.totolink.net/
More from A8000RU
9.8
CVE-2026-9478
Totolink A8000RU Web Management cstecgi.cgi setParentalRules os command injection
9.8
CVE-2026-9477
Totolink A8000RU Web Management cstecgi.cgi setAccessDeviceCfg os command injection
9.8
CVE-2026-9476
Totolink A8000RU Web Management cstecgi.cgi setPasswordCfg os command injection
9.8
CVE-2026-9475
Totolink A8000RU Web Management cstecgi.cgi setIpQosRules os command injection
9.8
CVE-2026-9458
Totolink A8000RU Web Management cstecgi.cgi setWanCfg os command injection