Critical severity · published Apr 9, 2026
CVE-2026-5977
Totolink A7100RU CGI cstecgi.cgi setWiFiBasicCfg os command injection
9.8
CVSS
2.1%
EPSS
No
On KEV
Description
A weakness has been identified in Totolink A7100RU 7.4cu.2313_b20191024. This impacts the function setWiFiBasicCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Executing a manipulation of the argument wifiOff can lead to os command injection. It is possible to launch the attack remotely. The exploit has been made available to the public and could 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)2.1% · higher than 82% 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-2026-5977
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5977
github.com
https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_163/README.md
vuldb.com
https://vuldb.com/submit/791823
vuldb.com
https://vuldb.com/vuln/356531
vuldb.com
https://vuldb.com/vuln/356531/cti
www.totolink.net
https://www.totolink.net/
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