Is CVE-2015-2059 in the CISA KEV catalog?

No. CVE-2015-2059 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-2059?

CVE-2015-2059 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2015-2059?

CVE-2015-2059 has an EPSS score of 3.19% (87th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-2059?

Upgrade libidn on debian 11 to 1.31-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2015-2059

HIGHEPSS 87th pctl

7.5

CVSS v2

NVD

Description

The stringprep_utf8_to_ucs4 function in libin before 1.31, as used in jabberd2, allows context-dependent attackers to read system memory and possibly have other unspecified impact via invalid UTF-8 characters in a string, which triggers an out-of-bounds read.

CWE-119Buffer Overflow

How to fix

Remediation Available

libidnDebian

Fixed in:1.31-1CVE-2015-2059

libidnUbuntu

Fixed in:1.28-1ubuntu2.1USN-3068-1

Fixed in:1.32-3ubuntu1.1USN-3068-1

libidn11Ubuntu

Fixed in:1.28-1ubuntu2.1USN-3068-1

Fixed in:1.32-3ubuntu1.1USN-3068-1

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

3.19%probability of exploitation in 30 days

87thpercentile

Elevated risk: more likely to be exploited than 87% of all known CVEs.

References

Patch2

Third-Party Advisory4

Other references4

Related Vulnerabilities

Other CWE-119 (Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-4966	Critical	9.4	100%	KEV + Ransom	Fix
CVE-2017-11882	High	7.8	100%	KEV + Ransom	-
CVE-2020-0796	Critical	10.0	100%	KEV + Ransom	-
CVE-2008-4250	Critical	9.8	99%	KEV	-
CVE-2017-15944	Critical	9.8	98%	KEV	Fix
CVE-2015-0014	High	10.0	97%	-	-

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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 2026-05-06.