CVE-2001-0660

NONECVSS 0.0Elevated

0.0

Outlook Web Access (OWA) in Microsoft Exchange 5.5, SP4 and earlier, allows remote attackers to identify valid user email addresses by directly accessing a back-end function that processes the global address list (GAL).

CVSS v3: —
EG Score: —
EPSS: 95.5%
KEV: Not listed

Published

October 30, 2001

Last Modified

April 16, 2026

References (8)

cve@mitrehttp://support.microsoft.com/support/kb/articles/Q307/1/95.ASP
cve@mitrehttp://www.securityfocus.com/bid/3301
cve@mitrehttps://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-047
cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/7089
af854a3a-2127-422b-91ae-364da2661108http://support.microsoft.com/support/kb/articles/Q307/1/95.ASP
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/3301
af854a3a-2127-422b-91ae-364da2661108https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-047
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/7089

Data Freshness Timeline

(refreshed 14× in last 7d / 19× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

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Frequently asked(4)

What is CVE-2001-0660?

CVE-2001-0660 is a none vulnerability published on October 30, 2001. Outlook Web Access (OWA) in Microsoft Exchange 5.5, SP4 and earlier, allows remote attackers to identify valid user email addresses by directly accessing a back-end function that processes the global address list (GAL).

When was CVE-2001-0660 disclosed?

CVE-2001-0660 was first published in the National Vulnerability Database on October 30, 2001, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2001-0660 actively exploited?

CVE-2001-0660 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 95.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2001-0660?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2001-0660, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2001-0660

📅 Published

🔄 Last Modified

🔗 References (8)