CVE-2022-43636 HIGH

CVE-2022-43636

Vendor Tp-Link
Product TL-WR940N
Weakness CWE-330 · Insufficient randomness
Published March 29, 2023
Last update February 12, 2025

CVSS base score

7.5/10
Attack vector Adjacent
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of TP-Link TL-WR940N 6_211111 3.20.1(US) routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the httpd service, which listens on TCP port 80 by default. The issue results from the lack of sufficient randomness in the sequnce numbers used for session managment. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-18334.

Key dates

02Disclosure timeline

March 29, 2023 CVE published
February 12, 2025 Record updated