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CVE-2015-7203

26
FAUCET Score

CVE-2015-7203 is a critical buffer overflow vulnerability in Mozilla Firefox versions prior to 43.0, specifically within the DirectWriteFontInfo::LoadFontFamilyData function, which could be triggered by a crafted font-family name. With a CVSS score of 10.0, this flaw allows for remote denial of service and potentially other severe impacts, including arbitrary code execution, due to its low attack complexity and lack of authentication. Despite its high severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 42.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
22CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*
23CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*
42.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
13.1CPE matchmatch criteria
cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

AV:N/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.32%
Probability of exploitation in next 30 days
EPSS Percentile
90.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0432 is in the 83rd percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2015-7203Moderate

Mozilla: Buffer overflows found through code inspection (MFSA 2015-144)

Dec 16, 2015

References

lists.fedoraproject.org / pipermail/package-announce/2015-December/174083.html
lists.fedoraproject.org / pipermail/package-announce/2015-December/174253.html
lists.opensuse.org / opensuse-updates/2015-12/msg00104.html
lists.opensuse.org / opensuse-updates/2016-02/msg00007.html
lists.opensuse.org / opensuse-updates/2016-02/msg00008.html
bugzilla.mozilla.org / show_bug.cgi
hg.mozilla.org / mozilla-central/rev/e1bcc04808cc
security.gentoo.org / glsa/201512-10
mozilla.org / security/announce/2015/mfsa2015-144.html
Vendor Advisory
securityfocus.com / bid/79280
securitytracker.com / id/1034426
ubuntu.com / usn/USN-2833-1