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CVE-2026-5688

Totolink A7100RU cstecgi.cgi setDdnsCfg os command injection

CVSS 6.9 MEDIUMEPSS 1.4%CWE-77CWE-78
Vexday Risk Score
33Attention
SSVC decision (CISA)
Attend
PoC available → attend closely
CVSS 6.9EPSS 1.4%KEV nãoPoC públicaNuclei —Metasploit —Patch —
Lifecycle
06 Apr 2026Published on NVD
Recommendation: Plan a near-term fix — a public PoC already exists.
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Affected products
Totolink · A7100RU
public PoCs found — 1
cve_referencegithub.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_186/README.mdunverified
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References
https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_186/README.mdhttps://vuldb.com/submit/792945https://vuldb.com/vuln/355515https://vuldb.com/vuln/355515/ctihttps://www.totolink.net/