What is CVE-2021-20122?

CVE-2021-20122 is a high-severity vulnerability in Telus Prv65b444a-S-Ts, classified under OS Command Injection. CVSS score: 7.2/10. Published 2021-10-11.

How severe is CVE-2021-20122?

High severity. CVSS v3 base score is 7.2 out of 10.

RCE in Telus Prv65b444a-S-Ts

CVE-2021-20122

The Telus Wi-Fi Hub (PRV65B444A-S-TS) with firmware version 3.00.20 is affected by an authenticated command injection vulnerability in multiple parameters passed to tr69_cmd.cgi. A remote attacker connected to the router's LAN and authenticated with a super user account, or using a bypass authentication vulnerability like CVE-2021-20090 could leverage this issue to run commands or gain a shell as root on the target device.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.065 (93.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Telus Prv65b444a-s-ts
Telus Prv65b444a-s-ts_firmware — versions 3.00.20
N/a Telus Wi-fi Hub (Prv65b444a-s-ts) — versions 3.00.20

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

vulnreport@tenable.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-20122?: CVE-2021-20122 is a high-severity vulnerability in Telus Prv65b444a-S-Ts, classified under OS Command Injection. CVSS score: 7.2/10. Published 2021-10-11.
How severe is CVE-2021-20122?: High severity. CVSS v3 base score is 7.2 out of 10.