High severity · published Apr 6, 2026
CVE-2026-5688
Totolink A7100RU cstecgi.cgi setDdnsCfg os command injection
7.3
CVSS
1.6%
EPSS
No
On KEV
Description
A security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. Impacted is the function setDdnsCfg of the file /cgi-bin/cstecgi.cgi. Such manipulation of the argument provider leads to os command injection. The attack may be launched remotely. The exploit has been disclosed publicly and may be used.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.6% · higher than 75% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
A7
A7100RU · Totolink
7.4cu.2313_b20191024 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-5688
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5688
github.com
https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_186/README.md
vuldb.com
https://vuldb.com/submit/792945
vuldb.com
https://vuldb.com/vuln/355515
vuldb.com
https://vuldb.com/vuln/355515/cti
www.totolink.net
https://www.totolink.net/
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