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CVE-2017-5398

31
FAUCET Score

CVE-2017-5398 is a critical memory safety vulnerability affecting Firefox versions prior to 52, Firefox ESR prior to 45.8, and Thunderbird versions prior to 52 and 45.8. With a CVSS score of 9.8, it presents a high risk of arbitrary code execution due to memory corruption. The vulnerability is network-exploitable with low attack complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion with 10 mentions, indicating awareness and potential interest.

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:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*

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
3.75%
Probability of exploitation in next 30 days
EPSS Percentile
88.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0375 is in the 81st percentile among its peer group of 36,897 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 (7)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:45.8.0-2.el6_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:45.8.0-2.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:45.8.0-1.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: thunderbird-0:45.8.0-1.el7_3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:45.8.0-1.el6_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:52.0-4.el7_3
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2017-5398Critical

Mozilla: Memory safety bugs fixed in Firefox 52 and Firefox ESR 45.8 (MFSA 2017-06)

Mar 7, 2017

References

rhn.redhat.com / errata/RHSA-2017-0459.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2017-0461.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2017-0498.html
Third Party Advisory
bugzilla.mozilla.org / buglist.cgi
Issue TrackingPermissions RequiredThird Party Advisory
security.gentoo.org / glsa/201705-06
Third Party Advisory
security.gentoo.org / glsa/201705-07
Third Party Advisory
debian.org / security/2017/dsa-3805
Third Party Advisory
debian.org / security/2017/dsa-3832
Third Party Advisory
mozilla.org / security/advisories/mfsa2017-05
Vendor Advisory
mozilla.org / security/advisories/mfsa2017-06
Vendor Advisory
mozilla.org / security/advisories/mfsa2017-07
Vendor Advisory
mozilla.org / security/advisories/mfsa2017-09
Vendor Advisory
securityfocus.com / bid/96651
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037966
Third Party AdvisoryVDB Entry