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CVE-2017-5430

30
FAUCET Score

CVE-2017-5430 is a critical memory safety vulnerability affecting Mozilla Firefox, Firefox ESR, and Thunderbird versions prior to 53, 52.1, and 52.1 respectively, as well as Red Hat Enterprise Linux distributions. With a CVSS score of 9.8, this flaw allows unauthenticated remote attackers to execute arbitrary code with high impact on confidentiality, integrity, and availability. While no public exploits or active exploitation have been confirmed, the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
< 52.1.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 53.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.01%
Probability of exploitation in next 30 days
EPSS Percentile
86.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0301 is in the 77th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:52.1.0-2.el7_3
View patch
mozillavendor investigatingvia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird

Vendor Advisories (1)

redhatCVE-2017-5430Critical

Mozilla: Memory safety bugs fixed in Firefox 53 and Firefox ESR 52.1 (MFSA 2017-12)

Apr 19, 2017

References

access.redhat.com / errata/RHSA-2017:1106
Third Party Advisory
bugzilla.mozilla.org / buglist.cgi
Issue Tracking
mozilla.org / security/advisories/mfsa2017-10
Vendor Advisory
mozilla.org / security/advisories/mfsa2017-12
Vendor Advisory
mozilla.org / security/advisories/mfsa2017-13
Vendor Advisory
securityfocus.com / bid/97940
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038320
Third Party AdvisoryVDB Entry