CVE-2026-3841CWE-78

Command Injection Vulnerability in Telnet CLI on TP-Link TL-MR6400

High · published March 12, 2026

CVSS v4.0
8.5
EPSS
3%
Percentile
86.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.5 · HIGH
Vector
CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.02879 · 86.7th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-03-12T17:25Z
EPSS history
Timeline
  • 12 MAR 17:25Z
    Command Injection Vulnerability in Telnet CLI on TP-Link TL-MR6400
    cvelistv5