Is CVE-2016-10196 in the CISA KEV catalog?

No. CVE-2016-10196 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-10196?

CVE-2016-10196 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2016-10196?

CVE-2016-10196 has an EPSS score of 5.21% (91th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-10196?

Upgrade libevent on debian 11 to 2.0.21-stable-3 or later. Fixes are available for 7 affected products.

CVE & CISA-KEV Catalog

CVE-2016-10196

HIGHEPSS 91th pctl

7.5

CVSS v3

NVD

Description

Stack-based buffer overflow in the evutil_parse_sockaddr_port function in evutil.c in libevent before 2.1.6-beta allows attackers to cause a denial of service (segmentation fault) via vectors involving a long string in brackets in the ip_as_string argument.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

libeventDebian

Fixed in:2.0.21-stable-3CVE-2016-10196

libeventUbuntu

Fixed in:2.0.21-stable-1ubuntu1.14.04.2USN-3228-1

Fixed in:2.0.21-stable-2ubuntu0.16.04.1USN-3228-1

libevent-2.0-5Ubuntu

Fixed in:2.0.21-stable-1ubuntu1.14.04.2USN-3228-1

Fixed in:2.0.21-stable-2ubuntu0.16.04.1USN-3228-1

thunderbirdUbuntu

Fixed in:1:52.1.1+build1-0ubuntu0.14.04.1USN-3278-1

Fixed in:1:52.1.1+build1-0ubuntu0.16.04.1USN-3278-1

DeveloperEditionWindows application

Affected:45.9.0Fixed in:45.9.0Mozilla

Affected:53.0Fixed in:53.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:45.9.0Fixed in:45.9.0Mozilla

Affected:53.0Fixed in:53.0Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:52.1.0Fixed in:52.1.0Mozilla

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

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

5.21%probability of exploitation in 30 days

91stpercentile

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

References

Patch1

github.com

Exploit1

github.com

Third-Party Advisory15

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	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 2026-05-13.