CVE Catalog
CVE-1999-1164
MediumExploitation Probability (EPSS)
Very high risk13.33%
96th percentile - higher than 96% of all known CVEs
Summary
The Microsoft Outlook client allows remote attackers to cause a denial of service by sending multiple email messages with the same X-UIDL headers, which causes Outlook to hang.
Risk Assessment
Attackers can exploit this vulnerability to disrupt user operations, potentially leading to a loss of productivity within the organization.
Recommendation
It is recommended to monitor and filter email messages to prevent the sending of messages with duplicate X-UIDL headers.
Original NVD description (English source)
Microsoft Outlook client allows remote attackers to cause a denial of service by sending multiple email messages with the same X-UIDL headers, which causes Outlook to hang.