PT-2026-30750 · Totolink · A7100Ru

Ltzhust2 · Published 2026-03-30 · Updated 2026-04-06 · CVE-2026-5689

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 The setNtpCfg() function within the '/cgi-bin/cstecgi.cgi' endpoint fails to properly neutralize special characters used in operating system commands when processing the tz parameter. This allows a remote attacker to bypass security restrictions and perform OS command injection, leading to the execution of arbitrary commands.

Recommendations As a temporary workaround, restrict access to the '/cgi-bin/cstecgi.cgi' endpoint or avoid using the tz parameter within the setNtpCfg() function until a fix is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Command Injection

OS Command Injection

Weakness Enumeration

CWE-77

CWE-78

Related Identifiers

BDU:2026-05253

CVE-2026-5689

Affected Products

A7100Ru

References · 7

• 🔥 https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_187/README.md · Exploit
• https://bdu.fstec.ru/vul/2026-05253 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-5689 · Security Note
• https://vuldb.com/vuln/355516/cti · Note
• https://totolink.net · Note
• https://vuldb.com/vuln/355516 · Note
• https://vuldb.com/submit/792946 · Note