CVE-2001-0660
CVE-2001-0660 is a medium-severity vulnerability in Microsoft Exchange Server with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 22% places it in the 97th percentile, indicating an elevated likelihood of exploitation.
Key facts
- Severity: Medium (CVSS 2.0 base score 5.0)
- EPSS exploit prediction: 22% (97th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Microsoft Exchange Server
- Published:
- Last modified:
Description
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).
Frequently asked questions
- What is CVE-2001-0660?
- 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).
- How severe is CVE-2001-0660?
- CVE-2001-0660 has a CVSS 2.0 base score of 5.0, rated medium severity.
- Is CVE-2001-0660 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2001-0660?
- CVE-2001-0660 affects Microsoft Exchange Server. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2001-0660?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2001-0660 published?
- CVE-2001-0660 was published on 2001-10-30 and last updated on 2026-06-16.
References
- http://support.microsoft.com/support/kb/articles/Q307/1/95.ASP
- http://www.securityfocus.com/bid/3301
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-047
- https://exchange.xforce.ibmcloud.com/vulnerabilities/7089
Affected products (1)
- cpe:2.3:a:microsoft:exchange_server:*:sp4:*:*:*:*:*:*
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