PT-2026-31853 · Totolink · Totolink A7100Ru

Ltzhust · CVE-2026-5997 · Published 2026-04-10 · Updated 2026-04-28

Positive Technologies (AI Summary)

CVSS v3.1

10

Critical

Base vector

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 vulnerability exists in the CGI Handler component of Totolink A7100RU. The setLoginPasswordCfg function within the /cgi-bin/cstecgi.cgi file is susceptible to os command injection through manipulation of the admpass parameter. This allows for remote execution of commands. A public exploit is available.

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

RCE

OS Command Injection

Command Injection

Weakness Enumeration

CWE-78

CWE-77

Related Identifiers

BDU:2026-07509

CVE-2026-5997

Affected Products

Totolink A7100Ru

References · 12

• 🔥 https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_169/README.md · Exploit
• https://bdu.fstec.ru/vul/2026-07509 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-5997 · Security Note
• https://vuldb.com/submit/792045 · Note
• https://twitter.com/ctiwatchcloud/status/2042573330209730950 · Twitter Post
• https://twitter.com/CVEarity/status/2042887358723559923 · Twitter Post
• https://vuldb.com/vuln/356551/cti · Note
• https://totolink.net · Note
• https://twitter.com/0dayPublishing/status/2042609725687149048 · Twitter Post
• https://vuldb.com/vuln/356551 · Note
• https://twitter.com/CVEnew/status/2042561808406655438 · Twitter Post
• https://twitter.com/CveFindCom/status/2042433178753724623 · Twitter Post