Is CVE-2007-4771 in the CISA KEV catalog?

No. CVE-2007-4771 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2007-4771?

CVE-2007-4771 has a CVSS v2 base score of 9.3 (HIGH).

What is the EPSS score for CVE-2007-4771?

CVE-2007-4771 has an EPSS score of 2.54% (83th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2007-4771?

Upgrade icu on debian 11 to 3.8-6 or later.

CVE & CISA-KEV Catalog

CVE-2007-4771

HIGHEPSS 83th pctl

9.3

CVSS v2

NVD

Description

Heap-based buffer overflow in the doInterval function in regexcmp.cpp in libicu in International Components for Unicode (ICU) 3.8.1 and earlier allows context-dependent attackers to cause a denial of service (memory consumption) and possibly have unspecified other impact via a regular expression that writes a large amount of data to the backtracking stack. NOTE: some of these details are obtained from third party information.

CWE-399Resource Management Errors

How to fix

Remediation Available

icuDebian

Fixed in:3.8-6CVE-2007-4771

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

2.54%probability of exploitation in 30 days

83rdpercentile

Elevated risk: more likely to be exploited than 83% of all known CVEs.

References

Related Vulnerabilities

Other CWE-399 (Resource Management Errors) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2009-3103	High	10.0	90%	-	-
CVE-2009-0075	High	9.3	85%	-	-
CVE-2005-1790	Low	2.6	83%	-	-
CVE-2010-0806	High	8.8	82%	KEV	-
CVE-2009-2526	High	7.8	82%	-	-
CVE-2015-1868	High	7.8	82%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.