CVE-2022-43635: TP-Link TL-WR940N httpd Incorrect Implementation of Authentication Algorithm Information Disclosure Vulnerability

Published Mar 29, 2023

Updated

This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of TP-Link TL-WR940N 6211111 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 incorrect implementation of the authentication algorithm. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise. Was ZDI-CAN-17332.

Other sources

This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of TP-Link TL-WR940N 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 incorrect implementation of the authentication algorithm. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise.

Affected Software

3 affected components

TP-Link TL-WR940N

TP-Link Tl-wr940n Firmware=6_211111_3.20.1

TP-Link TL-WR940N

Event History

Mar 29, 2023

CVE Published

via MITRE·12:00 AM

Data Sourced

via MITRE·12:00 AM

DescriptionSeverityWeakness

Mar 24, 2025

Advisory Published

via ZDI·03:10 PM

Frequently Asked Questions

What is the vulnerability ID for this TP-Link TL-WR940N vulnerability?

The vulnerability ID for this TP-Link TL-WR940N vulnerability is CVE-2022-43635.

What is the title of this vulnerability?

The title of this vulnerability is TP-Link TL-WR940N httpd Incorrect Implementation of Authentication Algorithm Information Disclosure.

What is the severity of CVE-2022-43635?

The severity of CVE-2022-43635 is medium with a severity value of 6.5.

How does CVE-2022-43635 affect TP-Link TL-WR940N routers?

CVE-2022-43635 allows network-adjacent attackers to disclose sensitive information on affected installations of TP-Link TL-WR940N 6_211111 3.20.1(US) routers.

Does exploiting CVE-2022-43635 require authentication?

No, authentication is not required to exploit CVE-2022-43635.

What is the specific flaw in this vulnerability?

The specific flaw exists within the httpd service of TP-Link TL-WR940N routers.

Are there any references available for CVE-2022-43635?

Yes, you can find references for CVE-2022-43635 at the following link: https://www.zerodayinitiative.com/advisories/ZDI-22-1615/