How severe is CVE-2011-4599?

CVE-2011-4599 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2011-4599 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-4599?

CVE-2011-4599 affects Icu-project International Components For Unicode. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-4599?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2011-4599 published?

CVE-2011-4599 was published on 2012-06-21 and last updated on 2026-06-16.

CVE-2011-4599

CVE-2011-4599 is a high-severity vulnerability in Icu-project International Components For Unicode with a CVSS 2.0 base score of 7.5. 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

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Icu-project International Components For Unicode
Published: 2012-06-21
Last modified: 2026-06-16

Description

Stack-based buffer overflow in the _canonicalize function in common/uloc.c in International Components for Unicode (ICU) before 49.1 allows remote attackers to execute arbitrary code via a crafted locale ID that is not properly handled during variant canonicalization.

Frequently asked questions

What is CVE-2011-4599?: Stack-based buffer overflow in the _canonicalize function in common/uloc.c in International Components for Unicode (ICU) before 49.1 allows remote attackers to execute arbitrary code via a crafted locale ID that is not properly handled during variant canonicalization.
How severe is CVE-2011-4599?: CVE-2011-4599 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2011-4599 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4599?: CVE-2011-4599 affects Icu-project International Components For Unicode. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-4599?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2011-4599 published?: CVE-2011-4599 was published on 2012-06-21 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:icu-project:international_components_for_unicode:*:*:*:*:*:c\/c\+\+:*:*

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