PT-2026-32223 · Totolink · Totolink A7100Ru

Ltzhust2 · Published 2026-03-31 · Updated 2026-04-13 · CVE-2026-6156

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 security flaw exists in the CGI Handler component of Totolink A7100RU version 7.4cu.2313 b20191024. Specifically, the setIpQosRules function within the /cgi-bin/cstecgi.cgi file is susceptible to os command injection through manipulation of the Comment argument. This allows for remote exploitation. The exploit has been publicly disclosed.

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

Command Injection

OS Command Injection

Weakness Enumeration

CWE-77

CWE-78

Related Identifiers

BDU:2026-07595

CVE-2026-6156

Affected Products

Totolink A7100Ru

References · 11

• 🔥 https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_197/README.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-6156 · Security Note
• https://bdu.fstec.ru/vul/2026-07595 · Security Note
• https://vuldb.com/vuln/357036/cti · Note
• https://twitter.com/CveFindCom/status/2043550516001624069 · Twitter Post
• https://vuldb.com/vuln/357036 · Note
• https://totolink.net · Note
• https://twitter.com/0dayPublishing/status/2043772401125663034 · Twitter Post
• https://vuldb.com/submit/793681 · Note
• https://twitter.com/vuldb/status/2043392260315009375 · Twitter Post
• https://twitter.com/ctiwatchcloud/status/2043660577638097379 · Twitter Post