Vulnerability Monitor

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CVE-2021-27245

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.

Published

2021-03-29T21:15:12.953

Last Modified

2024-11-21T05:57:40.570

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.1 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

  • Access Vector: NETWORK
  • Access Complexity: MEDIUM
  • Authentication: NONE
  • Confidentiality Impact: COMPLETE
  • Integrity Impact: COMPLETE
  • Availability Impact: COMPLETE
Exploitability Score

8.6

Impact Score

10.0

Weaknesses
  • Type: Primary
    CWE-693
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System tp-link archer_a7_firmware < c7\(us\)_v5_210125 Yes
Hardware tp-link archer_a7 - No
Operating System tp-link archer_a7_firmware < a7\(us\)_v5_200220 Yes
Hardware tp-link archer_a7 - No
References