What is the severity of ZDI-21-214?

ZDI-21-214 is classified as a high severity vulnerability due to its potential for firewall bypass.

How do I fix ZDI-21-214?

To fix ZDI-21-214, ensure that you update the TP-Link Archer A7 router firmware to the latest version provided by the vendor.

What is the impact of exploiting ZDI-21-214?

Exploiting ZDI-21-214 allows unauthorized access to the network through a firewall bypass, potentially exposing sensitive data.

Which devices are affected by ZDI-21-214?

ZDI-21-214 specifically affects TP-Link Archer A7 AC1750 routers configured with IPv6.

Is authentication required to exploit ZDI-21-214?

No, authentication is not required to exploit ZDI-21-214, making it more critical for users to address the vulnerability.

Vulnerability/
ZDI-21-214

high

8.1

3/8/2024

ZDI-21-214: TP-Link Archer A7 Protection Mechanism Failure Firewall Bypass Vulnerability

This vulnerability allows a firewall bypass on affected installations of TP-Link Archer A7 AC1750 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of IPv6 connections. The issue results from the lack of proper filtering of IPv6 SSH connections. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root.

Affected Software	Affected Version	How to fix
TP-Link Archer A7

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Reference Links

https://www.zerodayinitiative.com/advisories/ZDI-21-214/

Frequently Asked Questions

What is the severity of ZDI-21-214?
ZDI-21-214 is classified as a high severity vulnerability due to its potential for firewall bypass.
How do I fix ZDI-21-214?
To fix ZDI-21-214, ensure that you update the TP-Link Archer A7 router firmware to the latest version provided by the vendor.
What is the impact of exploiting ZDI-21-214?
Exploiting ZDI-21-214 allows unauthorized access to the network through a firewall bypass, potentially exposing sensitive data.
Which devices are affected by ZDI-21-214?
ZDI-21-214 specifically affects TP-Link Archer A7 AC1750 routers configured with IPv6.
Is authentication required to exploit ZDI-21-214?
No, authentication is not required to exploit ZDI-21-214, making it more critical for users to address the vulnerability.

agent/type
agent/softwarecombine
collector/zdi-advisory
source/ZDI
alias/ZDI-21-214
alias/ZDI-CAN-12309
alias/CVE-2021-27245
agent/software-canonical-lookup
agent/severity
agent/title
agent/references
agent/description
agent/tags
agent/event
agent/source
vendor/tp-link
canonical/tp-link archer a7

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Frequently Asked Questions

What is the severity of ZDI-21-214?
ZDI-21-214 is classified as a high severity vulnerability due to its potential for firewall bypass.
How do I fix ZDI-21-214?
To fix ZDI-21-214, ensure that you update the TP-Link Archer A7 router firmware to the latest version provided by the vendor.
What is the impact of exploiting ZDI-21-214?
Exploiting ZDI-21-214 allows unauthorized access to the network through a firewall bypass, potentially exposing sensitive data.
Which devices are affected by ZDI-21-214?
ZDI-21-214 specifically affects TP-Link Archer A7 AC1750 routers configured with IPv6.
Is authentication required to exploit ZDI-21-214?
No, authentication is not required to exploit ZDI-21-214, making it more critical for users to address the vulnerability.