Toby Drew

**Name of the Vulnerable Software and Affected Versions** TP-Link Archer A7 Firmware version 190726 **Description** This issue allows remote attackers to execute arbitrary code on affected installations of TP-Link Archer A7 routers. Authentication is not required to exploit this issue. The specific flaw exists within the tmpServer service, which listens on TCP port 20002. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this issue to execute code in the context of the current process. **Recommendations** For TP-Link Archer A7 Firmware version 190726, as a temporary workaround, consider disabling the tmpServer service until a patch is available. Restrict access to TCP port 20002 to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this issue.

**Name of the Vulnerable Software and Affected Versions** TP-Link Archer A7 Firmware version 190726 **Description** This issue allows a firewall bypass on affected TP-Link Archer A7 installations. It does not require authentication to exploit. The flaw exists within the handling of IPv6 connections, specifically due to the lack of proper filtering of IPv6 SSH connections. An attacker can leverage this, potentially in conjunction with other issues, to execute code in the context of root. **Recommendations** For TP-Link Archer A7 Firmware version 190726, consider restricting or disabling IPv6 SSH connections as a temporary mitigation measure until a patch is available. Additionally, restrict access to the handling of IPv6 connections to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

**Name of the Vulnerable Software and Affected Versions** TP-Link Archer A7 Firmware version 190726 **Description** This issue allows remote attackers to bypass authentication on affected installations. The specific flaw exists within the handling of SSH port forwarding requests during initial setup, resulting from the lack of proper authentication prior to establishing SSH port forwarding rules. An attacker can leverage this to escalate privileges to resources normally protected from the WAN interface. **Recommendations** For TP-Link Archer A7 Firmware version 190726, as a temporary workaround, consider disabling SSH port forwarding until a patch is available. Restrict access to the WAN interface to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.