CVE-2002-2253

CVE-2002-2253 is a critical-severity vulnerability in Cyrus Libsieve with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Description

Multiple buffer overflows in Cyrus Sieve / libSieve 2.1.2 and earlier allow remote attackers to execute arbitrary code via (1) a long header name, (2) a long IMAP flag, or (3) a script that generates a large number of errors that overflow the resulting error string.

Frequently asked questions

What is CVE-2002-2253?
Multiple buffer overflows in Cyrus Sieve / libSieve 2.1.2 and earlier allow remote attackers to execute arbitrary code via (1) a long header name, (2) a long IMAP flag, or (3) a script that generates a large number of errors that overflow the resulting error string.
How severe is CVE-2002-2253?
CVE-2002-2253 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2002-2253 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2002-2253?
CVE-2002-2253 affects Cyrus Libsieve. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2002-2253?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2002-2253 published?
CVE-2002-2253 was published on 2002-12-31 and last updated on 2026-06-16.

References

Affected products (1)

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