CVE-2026-6140

Totolink A7100RU CGI cstecgi.cgi UploadFirmwareFile os command injection

CVSS 9.3 CRITICALEPSS 2.2%CWE-77 CWE-78

Vexday Risk Score

48Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

CVSS 9.3EPSS 2.2%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

13 Apr 2026Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

A vulnerability was found in Totolink A7100RU 7.4cu.2313_b20191024. This impacts the function UploadFirmwareFile of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument FileName results in os command injection. The attack may be initiated remotely. The exploit has been made public and could be used.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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_193/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_193/README.md https://vuldb.com/submit/792987 https://vuldb.com/vuln/357004 https://vuldb.com/vuln/357004/cti https://www.totolink.net/