Remote code execution in TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2

1) OS Command Injection

EUVDB-ID: #VU111164

Risk: Critical

CVSSv4.0: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red]

CVE-ID: CVE-2023-33538

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation. A remote unauthenticated attacker can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

TL-WR940N: All versions

TL-WR841N: All versions

TL-WR740N: All versions

CPE2.3

• cpe:2.3:h:tp-link:tl-wr940n:*:*:*:*:*:*:*:*
• cpe:2.3:h:tp-link:tl-wr841n:*:*:*:*:*:*:*:*
• cpe:2.3:h:tp-link:tl-wr740n:*:*:*:*:*:*:*:*

External links

https://github.com/a101e-IoTvul/iotvul/blob/main/tp-link/3/TL-WR940N_TL-WR841N_userRpm_WlanNetworkRpm_Command_Injection.md

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.