Login Request a demo
Critical severity · published May 25, 2026
CVE-2026-9436
Totolink A8000RU Web Management cstecgi.cgi setL2tpServerCfg os command injection
9.8
CVSS
2%
EPSS
No
On KEV
Description
A flaw has been found in Totolink A8000RU 7.1cu.643_b20200521. The impacted element is the function setL2tpServerCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Executing a manipulation of the argument enable can lead to os command injection. The attack can be executed remotely. The exploit has been published 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)2.0% · higher than 81% 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
Affected product
A8
A8000RU
Totolink
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-9436
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-9436
github.com
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_357/README.md
vuldb.com
https://vuldb.com/submit/813461
vuldb.com
https://vuldb.com/submit/813909
vuldb.com
https://vuldb.com/vuln/365417
vuldb.com
https://vuldb.com/vuln/365417/cti
www.totolink.net
https://www.totolink.net/
More from A8000RU
9.8
CVE-2026-9478
Totolink A8000RU Web Management cstecgi.cgi setParentalRules os command injection
9.8
CVE-2026-9477
Totolink A8000RU Web Management cstecgi.cgi setAccessDeviceCfg os command injection
9.8
CVE-2026-9476
Totolink A8000RU Web Management cstecgi.cgi setPasswordCfg os command injection
9.8
CVE-2026-9475
Totolink A8000RU Web Management cstecgi.cgi setIpQosRules os command injection
9.8
CVE-2026-9458
Totolink A8000RU Web Management cstecgi.cgi setWanCfg os command injection