CVE-2021-27245

Description

This vulnerability allows a firewall bypass on affected installations of TP-Link Archer A7 prior to Archer C7(US)_V5_210125 and Archer A7(US)_V5_200220 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. Was ZDI-CAN-12309.

Category

8.1
CVSS
Severity: High
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 4.21% Top 15%
Third-Party Advisory zerodayinitiative.com
Affected: TP-Link Archer A7
Published at:
Updated at:

References

Link Tags
https://www.zerodayinitiative.com/advisories/ZDI-21-214/ vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-27245?
CVE-2021-27245 has been scored as a high severity vulnerability.
How to fix CVE-2021-27245?
To fix CVE-2021-27245, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-27245 being actively exploited in the wild?
It is possible that CVE-2021-27245 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-27245?
CVE-2021-27245 affects TP-Link Archer A7.
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