CVE-2002-2253: Multiple buffer overflows in Cyrus Sieve / libSieve 2.1.2 and earlier allow remote attackers to execute arb...

Security readout for executives and security teams

This is an old memory-safety flaw in Cyrus Sieve / libSieve 2.1.2 and earlier. A remote attacker could trigger buffer overflows through oversized Sieve-related inputs, with the reported impact of arbitrary code execution. Business urgency depends on whether legacy mail filtering infrastructure still uses these components. Exposure is most likely in legacy mail systems running Cyrus Sieve / libSieve 2.1.2 or earlier, especially where Sieve functionality is reachable by remote users. Modern supported deployments may not be affected, but the bundle does not provide enough product or package metadata to confirm. Treat this as a legacy mail-platform risk. Prioritize confirmation of exposure first; if affected versions remain reachable, remediate quickly because the reported impact is remote code execution. Mitigation focus: Inventory mail systems for Cyrus Sieve / libSieve 2.1.2 or earlier.; Check vendor or distribution advisories for fixed package guidance.; Upgrade or replace affected legacy components when a supported fix is available..

Prepared

Jun 29, 2026, 02:29 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.