CVE-2007-4771: Heap-based buffer overflow in the doInterval function in regexcmp.cpp in libicu in International Components...

Security readout for executives and security teams

This is an old ICU library flaw where a crafted regular expression can exhaust memory and crash affected software. The public record names denial of service as the clear impact and only says other impact is possible. Business urgency depends on whether legacy systems still use ICU 3.8.1 or earlier. Exposure is most likely in legacy operating systems, desktop suites, or applications that embed or dynamically link ICU 3.8.1 or earlier. Modern supported platforms are less likely affected, but bundled copies in older software need explicit inventory validation. Treat as a legacy exposure cleanup item unless inventory finds internet-facing or business-critical systems processing untrusted regexes with old ICU. Prioritize remediation where a crash could disrupt customer-facing services or operational workflows. Mitigation focus: Inventory ICU and libicu versions across hosts, containers, and bundled application dependencies.; Apply relevant vendor updates from operating system or application maintainers.; Replace unsupported ICU 3.8.1 or earlier with a supported maintained version where feasible..

Prepared

Jun 28, 2026, 19:27 UTC (UTC+00:00)

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