What’s Vulnerable › Vulnerabilities

CVE-1999-1043

• 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 Exchange Server 5.5 and 5.0 does not properly handle (1) malformed NNTP data, or (2) malformed SMTP data, which allows remote attackers to cause a denial of service (application error).

Affected products

• Microsoft Exchange Server: 5.0, 5.5

References

• https://docs.microsoft.com/en-us/security-updates/securitybulletins/1998/ms98-007
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/1998/ms98-007

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