How severe is CVE-2001-1154?

CVE-2001-1154 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2001-1154 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-1154?

CVE-2001-1154 primarily affects Carnegie Mellon University Cyrus Imap Server. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2001-1154?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2001-1154 published?

CVE-2001-1154 was published on 2001-08-30 and last updated on 2026-06-16.

CVE-2001-1154

CVE-2001-1154 is a medium-severity vulnerability in Carnegie Mellon University Cyrus Imap Server with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Carnegie Mellon University Cyrus Imap Server
Published: 2001-08-30
Last modified: 2026-06-16

Description

Cyrus 2.0.15, 2.0.16, and 1.6.24 on BSDi 4.2, with IMAP enabled, allows remote attackers to cause a denial of service (hang) using PHP IMAP clients.

Frequently asked questions

What is CVE-2001-1154?: Cyrus 2.0.15, 2.0.16, and 1.6.24 on BSDi 4.2, with IMAP enabled, allows remote attackers to cause a denial of service (hang) using PHP IMAP clients.
How severe is CVE-2001-1154?: CVE-2001-1154 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2001-1154 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-1154?: CVE-2001-1154 primarily affects Carnegie Mellon University Cyrus Imap Server. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2001-1154?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2001-1154 published?: CVE-2001-1154 was published on 2001-08-30 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:a:carnegie_mellon_university:cyrus_imap_server:1.6.24:*:*:*:*:*:*:*
cpe:2.3:a:carnegie_mellon_university:cyrus_imap_server:2.0.15:*:*:*:*:*:*:*
cpe:2.3:a:carnegie_mellon_university:cyrus_imap_server:2.0.16:*:*:*:*:*:*:*
cpe:2.3:o:bsdi:bsd_os:4.2:*:*:*:*:*:*:*

More vulnerabilities in Carnegie Mellon University Cyrus Imap Server

CVE-2004-1012 — Critical (CVSS 10.0): The argument parser of the PARTIAL command in Cyrus IMAP Server 2.2.6 and earlier allows remote authenticated users to…
CVE-2004-1067 — Critical (CVSS 10.0): Off-by-one error in the mysasl_canon_user function in Cyrus IMAP Server 2.2.9 and earlier leads to a buffer overflow,…
CVE-2004-1011 — Critical (CVSS 10.0): Stack-based buffer overflow in Cyrus IMAP Server 2.2.4 through 2.2.8, with the imapmagicplus option enabled, allows…
CVE-2004-1013 — Critical (CVSS 10.0): The argument parser of the FETCH command in Cyrus IMAP Server 2.2.x through 2.2.8 allows remote authenticated users to…
CVE-2004-1015 — Critical (CVSS 10.0): Buffer overflow in proxyd for Cyrus IMAP Server 2.2.9 and earlier, with the imapmagicplus option enabled, may allow…
CVE-2002-1580 — High (CVSS 7.5): Integer overflow in imapparse.c for Cyrus IMAP server 1.4 and 2.1.10 allows remote attackers to execute arbitrary code…

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