PT-2026-28755 · Totolink · Totolink A3300R

Ltzhuster2 · Published 2026-03-29 · Updated 2026-03-30 · CVE-2026-5101

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 flaw exists in the Parameter Handler component of Totolink A3300R. The setLanCfg function within the /cgi-bin/cstecgi.cgi file is susceptible to command injection through manipulation of the lanIp argument. Remote exploitation is possible. The exploit is publicly 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

Command Injection

OS Command Injection

Special Elements Injection

Weakness Enumeration

CWE-77

CWE-78

CWE-74

Related Identifiers

CVE-2026-5101

Affected Products

Totolink A3300R

References · 7

• 🔥 https://github.com/Litengzheng/vul_db/blob/main/A3300R/vul_39/README.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-5101 · Security Note
• https://vuldb.com/vuln/354126/cti · Note
• https://vuldb.com/submit/779128 · Note
• https://vuldb.com/vuln/354126 · Note
• https://totolink.net · Note
• https://twitter.com/CVEnew/status/2038516975354499163 · Twitter Post