What’s Vulnerable › Vulnerabilities

CVE-1999-0993

• Severity: high (CVSS 7.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 7.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2000-02-04 · updated 2026-06-16
• Weakness: CWE-665

Description

Modifications to ACLs (Access Control Lists) in Microsoft Exchange 5.5 do not take effect until the directory store cache is refreshed.

Affected products

• Microsoft Exchange Server: 5.0, 5.5

References

• https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0993
• https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0993

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