Vulnerability details

CVE-2026-5994

Totolink A7100RU

Totolink A7100RU CGI cstecgi.cgi setTelnetCfg os command injection

CVSS 4.0

9.3Critical

Official 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 scores

Score	Version	Source	Vector
9.3Critical	4.0	CVEProject cvelistV5 (CNA) (VulDB)	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P`
9.8Critical	3.1	CVEProject cvelistV5 (CNA) (VulDB)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R`
9.8Critical	3.0	CVEProject cvelistV5 (CNA) (VulDB)	`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R`
10.0High	2.0	CVEProject cvelistV5 (CNA) (VulDB)	`AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR`

Affected products

Vendor	Product	Versions	Source
Totolink	A7100RU	7.4cu.2313_b20191024	CVEProject cvelistV5 (CNA)

References and advisories

https://vuldb.com/vuln/356548 vdb-entrytechnical-description
https://vuldb.com/vuln/356548/cti signaturepermissions-required
https://vuldb.com/submit/792042 third-party-advisory
https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_166/README.md exploit
https://www.totolink.net/ product

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Details

Published: 2026-04-10
Last updated: 2026-04-10
State: Published
Assigner (CNA): VulDB

Exploit prediction (EPSS)

1.83%

Probability of exploitation in 30 days

79%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: Proof of concept
Technical impact: Total

Weaknesses (CWE)

CWE-78
OS Command Injection
CWE-77
Command Injection