Vulnerability details

CVE-2026-9458

Totolink A8000RU

Totolink A8000RU Web Management cstecgi.cgi setWanCfg os command injection

CVSS 4.0

9.3Critical

Official description

A vulnerability was identified in Totolink A8000RU 7.1cu.643_b20200521. The impacted element is the function setWanCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Such manipulation of the argument enabled leads to os command injection. The attack may be performed from remote. The exploit is publicly available and might be used.

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	A8000RU	7.1cu.643_b20200521	CVEProject cvelistV5 (CNA)

References and advisories

https://vuldb.com/vuln/365439 vdb-entrytechnical-description
https://vuldb.com/vuln/365439/cti signaturepermissions-required
https://vuldb.com/submit/813457 third-party-advisory
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_346/README.md exploit
https://www.totolink.net/ product

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Details

Published: 2026-05-25
Last updated: 2026-05-28
State: Published
Assigner (CNA): VulDB

Exploit prediction (EPSS)

2.09%

Probability of exploitation in 30 days

81.7%

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