Critical severity · published Apr 13, 2026
CVE-2026-6139
Totolink A7100RU CGI cstecgi.cgi UploadOpenVpnCert os command injection
9.8
CVSS
1.8%
EPSS
No
On KEV
Description
A vulnerability has been found in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function UploadOpenVpnCert of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument FileName leads to os command injection. The attack can be launched remotely. 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 79% 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-2026-6139
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-6139
github.com
https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_192/README.md
vuldb.com
https://vuldb.com/submit/792982
vuldb.com
https://vuldb.com/vuln/357003
vuldb.com
https://vuldb.com/vuln/357003/cti
www.totolink.net
https://www.totolink.net/
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