CVE-1999-1164

Summary

CVE-1999-1164 is a denial-of-service vulnerability affecting Microsoft Outlook clients. Attackers can cause Outlook to become unresponsive by sending multiple emails with identical X-UIDL headers. This issue arises due to Outlook's failure to properly handle duplicate X-UIDL headers, leading to a hanging condition. The vulnerability can be exploited to cause significant disruption to email services in targeted environments. Users are advised to update their Microsoft Outlook installations to address this issue and prevent potential denial-of-service attacks.

Prevent cyber attacks with Recorded Future by prioritizing and patching critical vulnerabilities being exploited by threat actors targeting your industry. Book your demo to learn more.