CVE-2021-27245

Published Mar 29, 2021 CVSS 3.1 · 8.1 High EPSS 3.3% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2021-14010 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.
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
zdi
Published
Updated
Aug 3, 2024, 8:48 PM
Reserved
Feb 16, 2021, 12:00 AM
Status
Modified
Published
Mar 29, 2021, 9:15 PM
Modified
Jun 17, 2026, 3:44 AM