Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2012-3971

33
FAUCET Score

CVE-2012-3971 describes a critical memory corruption vulnerability in SIL Graphite 2, impacting Mozilla Firefox, Thunderbird, and SeaMonkey versions prior to 15.0 and 2.12 respectively. This flaw allows remote attackers to execute arbitrary code or cause a denial of service through specially crafted input to the Silf::readClassMap and Pass::readPass functions. With a CVSS score of 10.0, this vulnerability is highly severe, requiring no authentication and having low attack complexity, leading to complete compromise of confidentiality, integrity, and availability. Despite its critical severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 14.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:1.0:*:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:1.0:preview_release:*:*:*:*:*:*
1.0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:1.0.1:*:*:*:*:*:*:*
1.0.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:1.0.2:*:*:*:*:*:*:*

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
5.24%
Probability of exploitation in next 30 days
EPSS Percentile
91.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0524 is in the 85th percentile among its peer group of 51,485 CVEs.

Social Chatter

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-2012-3971Moderate

Mozilla: Graphite 2 memory corruption (MFSA 2012-64)

Aug 28, 2012

References

lists.opensuse.org / opensuse-security-announce/2012-08/msg00028.html
lists.opensuse.org / opensuse-security-announce/2012-09/msg00011.html
lists.opensuse.org / opensuse-security-announce/2012-09/msg00014.html
bugzilla.mozilla.org / show_bug.cgi
bugzilla.mozilla.org / show_bug.cgi
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16062
mozilla.org / security/announce/2012/mfsa2012-64.html
Vendor Advisory
securityfocus.com / bid/55304
ubuntu.com / usn/USN-1548-1
ubuntu.com / usn/USN-1548-2