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CVE-2015-6978

19
FAUCET Score

CVE-2015-6978 describes a memory corruption vulnerability in the FontParser component of Apple iOS before 9.1 and OS X before 10.11.1, allowing remote attackers to execute arbitrary code or cause a denial of service via a crafted font file. With a CVSS score of 6.8 (medium), this vulnerability requires medium attack complexity and could lead to partial confidentiality, integrity, and availability impacts. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.0CPE matchmatch criteria
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
<= 10.11.0CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
<= 9.0.2CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.8MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.78%
Probability of exploitation in next 30 days
EPSS Percentile
91.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0478 is in the 89th percentile among its peer group of 19,958 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, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Vendor Patches (1)

applevendor investigatingvia nvd_reference
View patch

References

lists.apple.com / archives/security-announce/2015/Dec/msg00002.html
Vendor Advisory
lists.apple.com / archives/security-announce/2015/Oct/msg00002.html
Vendor Advisory
lists.apple.com / archives/security-announce/2015/Oct/msg00005.html
Vendor Advisory
support.apple.com / HT205370
Vendor Advisory
support.apple.com / HT205375
Vendor Advisory
support.apple.com / HT205641
Vendor Advisory
securityfocus.com / bid/77263
securitytracker.com / id/1033929
zerodayinitiative.com / advisories/ZDI-15-533