CVE-1999-1164: Microsoft Outlook client allows remote attackers to cause a denial of service by sending multiple email messages with th
Summary
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.
Severity
UNKNOWN
Source Attribution
Source: NVD · Updated: 2026-08-21T04:30:47.324Z · Confidence: high
Impact
Based on CVSS vector: n/a — assess confidentiality, integrity, and availability impact via the official vector documentation.
Affected Software
Fix
Upgrade affected software to the fixed version identified above. Apply vendor patches and monitor advisories before exposed systems go unpatched.