Critical severity · published Apr 28, 2026
CVE-2026-7243
Totolink A8000RU CGI cstecgi.cgi setRadvdCfg os command injection
9.8
CVSS
2.4%
EPSS
No
On KEV
Description
A vulnerability was identified in Totolink A8000RU 7.1cu.643_b20200521. The affected element is the function setRadvdCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument maxRtrAdvInterval leads to os command injection. It is possible to initiate the attack 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)2.4% · higher than 84% 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-2026-7243
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-7243
github.com
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_327/README.md
vuldb.com
https://vuldb.com/submit/803266
vuldb.com
https://vuldb.com/vuln/359850
vuldb.com
https://vuldb.com/vuln/359850/cti
www.totolink.net
https://www.totolink.net/
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