Critical severity · published May 25, 2026
CVE-2026-9458
Totolink A8000RU Web Management cstecgi.cgi setWanCfg os command injection
9.8
CVSS
2.1%
EPSS
No
On KEV
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 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
A8
A8000RU · Totolink
7.1cu.643_b20200521 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-9458
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-9458
github.com
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_346/README.md
vuldb.com
https://vuldb.com/submit/813457
vuldb.com
https://vuldb.com/vuln/365439
vuldb.com
https://vuldb.com/vuln/365439/cti
www.totolink.net
https://www.totolink.net/
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