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What is it? Microsoft Exchange Server (2016, 2019 and Subscription) on-premises has a vulnerability allowing an attacker who first gains administrative access to an on-premises Exchange server could potentially escalate privileges within the organization's connected...

What is it? Microsoft Exchange Server has a number of vulnerabilities that allow attackers to infect your computer (or use your comupter to attack others). Why is it a risk? Although each is slightly different, in general these vulnerabilities allow attackers to run...

What is it? Server Message Block (SMB) is a long-standing protocol for sharing files, printers, named pipes, and other network resources. Windows Exchange Server (2016, 2019, 2022) all use SMB version 3.1.1 Why is it a risk? Certain carefully crafted commands, sent to...

What is it? On 06 Aug 2025, Microsoft disclosed a vulnerability in Microsoft Exchange Server which allows an administrator of a local Exchange Server to elevate their priviledges and gain access to other users' Exchange Online cloud accounts. Why is it a risk?...

What is it? Exim is a very popular mail transfer agent (MTA). In 2020, researchers found 21 unique vulnerabilities in Exim. Collectively, these threats are called "21nails." Why is it a risk? While each of the 21 vulnerabilities is a threat, some of the...

What is it? Microsoft Sharepoint (Subscription Edition, 2019 and 2016) on-premises servers are being actively attacked (as of 2025-07-19). Why is it a risk? Using this vulnerability, an attacker can execute arbitrary code on your server from a remote location. This is...

What is it? A weakness has been identified in the Huawei HG532 router. This weakness has been observed being exploited "in the wild." The source code for this exploit has been published, increasing the risk of copy-cat threats. Why is it a risk? An authenticated...

What is it? A honeypot is a trap intentionally set to attract malicious software or users. A simple example is a form field on a web page labelled "User Name" but which is rendered invisible when displayed on the screen. A computer scanning the page will fill this...

What is it? Telnet allows a user to open a command terminal on a remote computer or device and execute commands. Telnet runs on port 23. Telnet is primarily used to log in to a remote server, but it can also be used to log in to routers and other network devices. Why...

What is it? Virtual Network Computing (VNC) is a platform-independent remote desktop control system. There are numerous VNC implementations (LibVNC, TightVNC, UltraVNC, etc.) which run on Windows, Linux, macOS, iOS, Android and other operating systems. VNC uses port...