PT-2026-30749 · Totolink · Totolink A7100Ru

Ltzhust2 · Published 2026-03-30 · Updated 2026-04-06 · CVE-2026-5688

Positive Technologies (AI Summary)

CVSS v2.0

7.5

High

Base vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Name of the Vulnerable Software and Affected Versions Totolink A7100RU version 7.4cu.2313 b20191024

Description A security issue exists in Totolink A7100RU version 7.4cu.2313 b20191024. The setDdnsCfg function within the /cgi-bin/cstecgi.cgi file is susceptible to OS command injection through manipulation of the provider argument. This allows for remote attacks.

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

OS Command Injection

Command Injection

Weakness Enumeration

CWE-78

CWE-77

Related Identifiers

BDU:2026-05252

CVE-2026-5688

Affected Products

Totolink A7100Ru

References · 8

• 🔥 https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_186/README.md · Exploit
• https://bdu.fstec.ru/vul/2026-05252 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-5688 · Security Note
• https://twitter.com/CVEnew/status/2041282858573295722 · Twitter Post
• https://vuldb.com/submit/792945 · Note
• https://totolink.net · Note
• https://vuldb.com/vuln/355515/cti · Note
• https://vuldb.com/vuln/355515 · Note