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CVE-2017-5470

33
FAUCET Score

CVE-2017-5470 addresses multiple memory safety bugs in Firefox, Firefox ESR, and Thunderbird, specifically affecting versions prior to Firefox 54, Firefox ESR 52.2, and Thunderbird 52.2. These vulnerabilities, categorized as CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer), could lead to memory corruption. With a CVSS score of 9.8 (CRITICAL), the vulnerability is network-exploitable with low attack complexity, potentially allowing for arbitrary code execution with high impact on confidentiality, integrity, and availability. While there is no evidence of active exploitation (KEV listed as No) and no public exploit code (Metasploit, Nuclei, ExploitDB are empty), the vulnerability has garnered significant community discussion with 11 mentions, indicating notable awareness.

Impacted Technologies

VendorProductVersion(s)CPE
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*

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
2.57%
Probability of exploitation in next 30 days
EPSS Percentile
83.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0257 is in the 74th 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

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 (5)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:52.2.0-1.el6_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:52.2.0-1.el6_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:52.2.0-1.el7_3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: thunderbird-0:52.2.0-1.el7_3
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2017-5470Critical

Mozilla: Memory safety bugs fixed in Firefox 54 and Firefox ESR 52.2 (MFSA 2017-16)

Jun 14, 2017

References

access.redhat.com / errata/RHSA-2017:1440
Third Party Advisory
access.redhat.com / errata/RHSA-2017:1561
Third Party Advisory
bugzilla.mozilla.org / buglist.cgi
Issue TrackingVendor Advisory
debian.org / security/2017/dsa-3881
Third Party Advisory
debian.org / security/2017/dsa-3918
Third Party Advisory
mozilla.org / security/advisories/mfsa2017-15
Vendor Advisory
mozilla.org / security/advisories/mfsa2017-16
Vendor Advisory
mozilla.org / security/advisories/mfsa2017-17
Vendor Advisory
securityfocus.com / bid/99041
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038689
Third Party AdvisoryVDB Entry