What’s Vulnerable › Vulnerabilities
CVE-1999-1164
- Severity: medium (CVSS 5.0 v2.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 13.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2001-09-12 · updated 2026-06-16
Description
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.
Affected products
- Microsoft Outlook: 97, 98, 2000
- Microsoft Outlook Express: all versions
References
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