Microsoft Outlook Security Warning

Toronto and Greater Toronto Area businesses are being alerted to a critical vulnerability in Microsoft Outlook that leaves them vulnerable to cyber-attacks. The CVE-2023-23397 vulnerability could allow attackers to execute arbitrary code in the current user’s context, potentially compromising sensitive data stored on the user’s computer.

Troy Drever, President of Pure IT, states, “This is a serious threat that could have significant implications for businesses in Toronto and the GTA. Businesses must immediately update their systems and protect themselves from this vulnerability.”

Nick Nouri, CEO of Computer Infotech, explained how the vulnerability works, stating, “The vulnerability is caused by a memory corruption issue that occurs when Outlook processes a specially crafted email message. If an attacker can successfully exploit this vulnerability, they can take control of the affected system and potentially access sensitive information stored on the user’s computer.”

Adam Bowles, Managing Director of ACT360, emphasized the importance of updating systems, stating, “Microsoft has released a security update that addresses this vulnerability. All businesses in Toronto and the GTA must update their systems as soon as possible to ensure they are protected.”

In addition to updating systems, users are advised to exercise caution when opening email messages from unknown senders, as these messages may contain malicious content that could exploit this vulnerability.

The CVE-2023-23397 vulnerability is a significant threat highlighting the need for continued vigilance against cyber attacks. Businesses in Toronto and the GTA must take proactive steps to ensure the security of their sensitive data by taking immediate action to update their systems and remaining vigilant against potential threats.


Businesses in Toronto and the Greater Toronto Area must take the CVE-2023-23397 vulnerability in Microsoft Outlook seriously. By following the advice of experts such as Troy Drever, Nick Nouri, and Adam Bowles and updating their systems, businesses can protect themselves from potential cyber attacks. The threat posed by this vulnerability highlights the importance of remaining vigilant against cyber threats and taking proactive steps to ensure the security of sensitive data.