How does CVE-2021-27246 impact TP-Link AC1750 routers?

CVE-2021-27246 allows attackers to execute arbitrary code on TP-Link Archer A7 AC1750 1.0.15 routers without authentication.

What is the severity of CVE-2021-27246?

CVE-2021-27246 is considered a high severity vulnerability with a CVSS score of 8 out of 10.

How can I check if my TP-Link AC1750 router is affected by CVE-2021-27246?

To check if your TP-Link AC1750 router is affected, ensure that you are using firmware version 1.0.15 and verify if the MAC address handling is vulnerable.

Is TP-Link AC1750 version 'a7' affected by CVE-2021-27246?

No, TP-Link AC1750 version 'a7' is not vulnerable to CVE-2021-27246.

Vulnerability/
CVE-2021-27246

high

CWE

121

14/4/2021

3/8/2024

CVE-2021-27246: TP-Link AC1750 sync-server Stack-based Buffer Overflow Remote Code Execution Vulnerability

First published: Wed Apr 14 2021(Updated: )

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link Archer A7 AC1750 1.0.15 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of MAC addresses by the tdpServer endpoint. A crafted TCP message can write stack pointers to the stack. An attacker can leverage this vulnerability to execute code in the context of the root user. Was ZDI-CAN-12306.

Credit: zdi-disclosures@trendmicro.com

Affected Software	Affected Version	How to fix
Tp-link Ac1750 Firmware	=1.0.15
TP-Link AC1750	=a7

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Reference Links

https://www.zerodayinitiative.com/advisories/ZDI-21-215/

Frequently Asked Questions

What is CVE-2021-27246?
CVE-2021-27246 is a vulnerability that allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link Archer A7 AC1750 1.0.15 routers.
How does CVE-2021-27246 impact TP-Link AC1750 routers?
CVE-2021-27246 allows attackers to execute arbitrary code on TP-Link Archer A7 AC1750 1.0.15 routers without authentication.
What is the severity of CVE-2021-27246?
CVE-2021-27246 is considered a high severity vulnerability with a CVSS score of 8 out of 10.
How can I check if my TP-Link AC1750 router is affected by CVE-2021-27246?
To check if your TP-Link AC1750 router is affected, ensure that you are using firmware version 1.0.15 and verify if the MAC address handling is vulnerable.
Is TP-Link AC1750 version 'a7' affected by CVE-2021-27246?
No, TP-Link AC1750 version 'a7' is not vulnerable to CVE-2021-27246.

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