PT-2026-31723 · Totolink · Totolink A7100Ru

Ltzhuster2 · Published 2026-04-09 · Updated 2026-04-19 · CVE-2026-5975

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

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

Description A vulnerability exists in the Totolink A7100RU device. The setDmzCfg function within the CGI Handler component, specifically in the /cgi-bin/cstecgi.cgi file, is susceptible to OS command injection. Manipulation of the wanIdx argument allows for remote execution of arbitrary commands. A public exploit is available.

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

Exploit

Fix

RCE

OS Command Injection

Command Injection

Weakness Enumeration

CWE-78

CWE-77

Related Identifiers

CVE-2026-5975

Affected Products

Totolink A7100Ru

References · 11

• 🔥 https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_161/README.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-5975 · Security Note
• https://vuldb.com/vuln/356529/cti · Note
• https://twitter.com/0dayPublishing/status/2042334155090936053 · Twitter Post
• https://twitter.com/CveFindCom/status/2042342515622158355 · Twitter Post
• https://vuldb.com/submit/791821 · Note
• https://twitter.com/OrizonCyber/status/2042392148620829070 · Twitter Post
• https://twitter.com/giuseppe_1337/status/2045680204589236637 · Twitter Post
• https://vuldb.com/vuln/356529 · Note
• https://twitter.com/CVEnew/status/2042340046833889291 · Twitter Post
• https://totolink.net · Note