CRITICAL

CVE-2021-27708

CVSS v3

9.8

CRITICAL

EPSS Score

20.2%

exploit probability

CISA KEV

No

known exploited

Exploitation

SSVC status

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.

Technical details

Published
4/14/2021

Frequently asked questions

What is CVE-2021-27708?

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.

Is CVE-2021-27708 actively exploited?

Active exploitation of CVE-2021-27708 has not been confirmed. The EPSS score is 20.2%, indicating the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-27708?

CVE-2021-27708 has a CVSS v3 base score of 9.8 (CRITICAL severity).

Is CVE-2021-27708 affecting your environment?

Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.