Critical severity · published Apr 10, 2026
CVE-2026-5994
Totolink A7100RU CGI cstecgi.cgi setTelnetCfg os command injection
9.8
CVSS
1.8%
EPSS
No
On KEV
Description
A security flaw has been discovered in Totolink A7100RU 7.4cu.2313_b20191024. This issue affects the function setTelnetCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument telnet_enabled results in os command injection. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks.
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
A7
A7100RU · Totolink
7.4cu.2313_b20191024 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-5994
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5994
github.com
https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_166/README.md
vuldb.com
https://vuldb.com/submit/792042
vuldb.com
https://vuldb.com/vuln/356548
vuldb.com
https://vuldb.com/vuln/356548/cti
www.totolink.net
https://www.totolink.net/
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