Is CVE-2016-6293 in the CISA KEV catalog?

No. CVE-2016-6293 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-6293?

CVE-2016-6293 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2016-6293?

CVE-2016-6293 has an EPSS score of 4.96% (91th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-6293?

Upgrade icu on debian 11 to 57.1-4 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2016-6293

CRITICALEPSS 91th pctl

9.8

CVSS v3

NVD

Description

The uloc_acceptLanguageFromHTTP function in common/uloc.cpp in International Components for Unicode (ICU) through 57.1 for C/C++ does not ensure that there is a '\0' character at the end of a certain temporary array, which allows remote attackers to cause a denial of service (out-of-bounds read) or possibly have unspecified other impact via a call with a long httpAcceptLanguage argument.

CWE-119Buffer Overflow

How to fix

Remediation Available

icuDebian

Fixed in:57.1-4CVE-2016-6293

icuUbuntu

Fixed in:52.1-3ubuntu0.5USN-3227-1

Fixed in:55.1-7ubuntu0.1USN-3227-1

libicu52Ubuntu

Fixed in:52.1-3ubuntu0.5USN-3227-1

libicu55Ubuntu

Fixed in:55.1-7ubuntu0.1USN-3227-1

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

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

4.96%probability of exploitation in 30 days

91stpercentile

High risk: more likely to be exploited than 91% of all known CVEs.

References

Exploit1

bugs.php.net

Third-Party Advisory2

Mailing List1

openwall.com

Other references2

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.