PT-2026-29188 · Totolink · Totolink A3300R

Lvhw · Published 2026-03-31 · Updated 2026-03-31 · CVE-2026-5178

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Totolink A3300R version 17.0.0cu.557 b20221024

Description A security issue exists in Totolink A3300R 17.0.0cu.557 b20221024. The setIptvCfg function within the /cgi-bin/cstecgi.cgi file is susceptible to command injection through manipulation of the vlanPriLan3 argument. Remote exploitation is possible. The exploit has been publicly disclosed.

Recommendations Apply a software update that addresses the vulnerability in the setIptvCfg function. As a temporary workaround, restrict access to the /cgi-bin/cstecgi.cgi file. Avoid using the vlanPriLan3 parameter in the affected API endpoint until the issue is resolved.

Exploit

Fix

Command Injection

Special Elements Injection

Weakness Enumeration

CWE-77

CWE-74

Related Identifiers

CVE-2026-5178

Affected Products

Totolink A3300R

References · 9

• 🔥 https://github.com/LvHongW/Vuln-of-totolink_A3300R/tree/main/A3300R_vlanPriLan3_cmd_inject · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-5178 · Security Note
• https://twitter.com/cyberbivash/status/2038850617708359802 · Twitter Post
• https://twitter.com/CVEnew/status/2038916033877336135 · Twitter Post
• https://totolink.net · Note
• https://vuldb.com/vuln/354246 · Note
• https://twitter.com/CVEarity/status/2038967594775171463 · Twitter Post
• https://vuldb.com/vuln/354246/cti · Note
• https://vuldb.com/submit/779147 · Note