CVE-2021-27708

CRITICAL

TOTOLINK X5000R <9.1.0u.6118_B20201102 - Command Injection

Title source: llm
STIX 2.1

Description

Command Injection in TOTOLINK X5000R router with firmware v9.1.0u.6118_B20201102, and TOTOLINK A720R router with firmware v4.1.5cu.470_B20200911 allows remote attackers to execute arbitrary OS commands by sending a modified HTTP request. This occurs because the function executes glibc's system function with untrusted input. In the function, "command" parameter is directly passed to the attacker, allowing them to control the "command" field to attack the OS.

References (2)

Core 2
Core References
Exploit, Third Party Advisory x_refsource_misc
https://hackmd.io/7FtB06f-SJ-SCfkMYcXYxA
Exploit, Third Party Advisory x_refsource_misc
https://hackmd.io/mDgIBvoxSPCZrZiZjfQGhw

Scores

CVSS v3 9.8
EPSS 0.2015
EPSS Percentile 95.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-78
Status published
Products (2)
totolink/a720r_firmware 4.1.5cu.470_b20200911
totolink/x5000r_firmware 9.1.0u.6118_b20201102
Published Apr 14, 2021
Tracked Since Feb 18, 2026