PT-2026-31591 · Totolink · Totolink A7100Ru

Ltzhust2 · Published 2026-04-09 · Updated 2026-04-10 · CVE-2026-5852

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 weakness exists in the Totolink A7100RU router. The setIptvCfg function within the /cgi-bin/cstecgi.cgi file, part of the CGI Handler component, is susceptible to OS command injection through manipulation of the igmpVer argument. 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, consider restricting access to the /cgi-bin/cstecgi.cgi file.

Exploit

Fix

RCE

Command Injection

OS Command Injection

Weakness Enumeration

CWE-77

CWE-78

Related Identifiers

CVE-2026-5852

Affected Products

Totolink A7100Ru

References · 12

• 🔥 https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_158/README.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-5852 · Security Note
• https://twitter.com/OrizonCyber/status/2042226044334198907 · Twitter Post
• https://twitter.com/CVEnew/status/2042186493603770819 · Twitter Post
• https://twitter.com/CveFindCom/status/2042146302570446946 · Twitter Post
• https://twitter.com/0dayPublishing/status/2042281317388144925 · Twitter Post
• https://vuldb.com/vuln/356378 · Note
• https://twitter.com/CVEarity/status/2042549371099844796 · Twitter Post
• https://vuldb.com/submit/791272 · Note
• https://vuldb.com/vuln/356378/cti · Note
• https://totolink.net · Note
• https://twitter.com/infoflowcloud/status/2042187515629547930 · Twitter Post