CVE-2026-6140 | THREATINT

Description

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.

PUBLISHED Reserved 2026-04-12 | Published 2026-04-13 | Updated 2026-04-13 | Assigner VulDB

CRITICAL: 9.3CVSS: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

CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

CRITICAL: 9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

10.0AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR

Problem types

OS Command Injection

Command Injection

Product status

7.4cu.2313_b20191024

affected

Timeline

2026-04-12:	Advisory disclosed
2026-04-12:	VulDB entry created
2026-04-12:	VulDB entry last update

Credits

LtzHuster (VulDB User) reporter

References

vuldb.com/vuln/357004 (VDB-357004 | Totolink A7100RU CGI cstecgi.cgi UploadFirmwareFile os command injection) vdb-entry technical-description

vuldb.com/vuln/357004/cti (VDB-357004 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/submit/792987 (Submit #792987 | Totolink A7100RU 7.4cu.2313_b20191024 Command Injection) third-party-advisory

github.com/.../vuldb_new/blob/main/A7100RU/vul_193/README.md exploit

www.totolink.net/ product

cve.org (CVE-2026-6140)

nvd.nist.gov (CVE-2026-6140)

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