Is CVE-2017-14491 in the CISA KEV catalog?

No. CVE-2017-14491 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-14491?

CVE-2017-14491 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2017-14491?

CVE-2017-14491 has an EPSS score of 84.92% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-14491?

Upgrade dnsmasq on debian 11 to 2.78-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2017-14491

CRITICALEPSS 100th pctl

9.8

CVSS v3

NVD

Description

Heap-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a crafted DNS response.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

dnsmasqDebian

Fixed in:2.78-1CVE-2017-14491

dnsmasqUbuntu

Fixed in:2.68-1ubuntu0.2USN-3430-1

Fixed in:2.75-1ubuntu0.16.04.3USN-3430-1

dnsmasq-baseUbuntu

Fixed in:2.68-1ubuntu0.2USN-3430-1

Fixed in:2.75-1ubuntu0.16.04.3USN-3430-1

dnsmasq-utilsUbuntu

Fixed in:2.68-1ubuntu0.2USN-3430-1

Fixed in:2.75-1ubuntu0.16.04.3USN-3430-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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

Exploit Intelligence

84.92%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

References

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.