CVE-2026-3841

A command injection vulnerability has been identified in the Telnet command-line interface (CLI) of TP-Link TL-MR6400 v5.3. This issue is caused by insufficient sanitization of data processed during specific CLI operations. An authenticated attacker with elevated privileges may be able to execute arbitrary system commands. Successful exploitation may lead to full device compromise, including potential loss of confidentiality, integrity, and availability.

Score

CVSS 3.1 8.8 High

Status

Analyzed - f23511db-6c3e-4e32-a477-6aa17d310630

Published

2026-03-12

Last modified

2026-03-13

Weaknesses

CWE-78

Affected products

• Tl-mr6400 Firmware (Tp-link)
• Tl-mr6400 V5.3 (Tp-link Systems Inc.)

References

• https://www.tp-link.com/en/support/download/tl-mr6400/v5.30/#Firmware
• https://www.tp-link.com/us/support/faq/5016/