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This issue allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link Omada ER605 routers. The flaw exists within the handling of the `username` parameter provided to the "/usr/bin/pppd" endpoint, due to the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this to execute code in the context of root. Devices are only vulnerable if configured to use a PPTP VPN with LDAP authentication.

A buffer overflow vulnerability has been identified in the postscript interpreter of Lexmark devices. This issue allows for remote code execution. The vulnerability was identified through 2021-12-07.

A write-what-where condition may be exploited by processing a specially crafted project file, potentially allowing an attacker to read or modify information, execute arbitrary code, and/or crash the application.

The issue is related to improper input validation. It can be exploited by processing a specially crafted project file that is not validated when the data is entered by a user. Successful exploitation may allow an attacker to read or modify information, execute arbitrary code, and/or crash the application.