PT-2026-31833 · Totolink · Totolink A7100Ru

Ltzhust · Published 2026-04-10 · Updated 2026-04-10 · CVE-2026-5993

Positive Technologies (AI Summary)

CVSS v3.1

10

Critical

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Totolink A7100RU version 7.4cu.2313 b20191024

Description A flaw exists in the CGI Handler component of the Totolink A7100RU. Specifically, the setWiFiGuestCfg function within the /cgi-bin/cstecgi.cgi file is susceptible to OS command injection through manipulation of the wifiOff argument. This allows for remote execution of commands on the affected system.

Recommendations Update to a newer version that contains a fix for this vulnerability. As a temporary workaround, restrict access to the /cgi-bin/cstecgi.cgi file.

Exploit

Fix

OS Command Injection

Command Injection

Weakness Enumeration

CWE-78

CWE-77

Related Identifiers

CVE-2026-5993

Affected Products

Totolink A7100Ru

References · 8

• 🔥 https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_165/README.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-5993 · Security Note
• https://vuldb.com/vuln/356547/cti · Note
• https://twitter.com/CVEnew/status/2042561813691457934 · Twitter Post
• https://vuldb.com/vuln/356547 · Note
• https://vuldb.com/submit/792041 · Note
• https://twitter.com/CveFindCom/status/2042418010351116454 · Twitter Post
• https://totolink.net · Note