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CVE-2026-5691

Totolink A7100RU cstecgi.cgi setFirewallType os command injection

CVSS 6.9 MEDIUMEPSS 1.2%CWE-77CWE-78
Vexday Risk Score
33Attention
SSVC decision (CISA)
Attend
PoC available → attend closely
CVSS 6.9EPSS 1.2%KEV nãoPoC públicaNuclei —Metasploit —Patch —
Lifecycle
06 Apr 2026Published on NVD
Recommendation: Plan a near-term fix — a public PoC already exists.
A vulnerability has been found in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function setFirewallType of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument firewallType leads to os command injection. The attack is possible to be carried out remotely. The exploit has been disclosed to the public 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_189/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_189/README.mdhttps://vuldb.com/submit/792962https://vuldb.com/vuln/355518https://vuldb.com/vuln/355518/ctihttps://www.totolink.net/