Critical severity · published Apr 10, 2026
CVE-2026-5993
Totolink A7100RU CGI cstecgi.cgi setWiFiGuestCfg os command injection
9.8
CVSS
1.8%
EPSS
No
On KEV
Description
A vulnerability was identified in Totolink A7100RU 7.4cu.2313_b20191024. This vulnerability affects the function setWiFiGuestCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument wifiOff leads to os command injection. The attack can be executed 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)1.8% · 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-2026-5993
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5993
github.com
https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_165/README.md
vuldb.com
https://vuldb.com/submit/792041
vuldb.com
https://vuldb.com/vuln/356547
vuldb.com
https://vuldb.com/vuln/356547/cti
www.totolink.net
https://www.totolink.net/
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