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CVE-2014-1520

18
FAUCET Score

CVE-2014-1520 describes a local privilege escalation vulnerability affecting Mozilla Firefox before version 29.0 and Firefox ESR 24.x before 24.5 on Windows. An attacker could exploit this by placing a malicious DLL in a temporary directory during the update process, allowing them to gain elevated privileges. With a CVSS score of 6.9, this vulnerability has high impact potential, requiring local access and moderate attack complexity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 29.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
>= 24.0, < 24.5CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
19CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:19:*:*:*:*:*:*:*
20CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:20:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.9MEDIUM

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
3.4
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.41%
Probability of exploitation in next 30 days
EPSS Percentile
33.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0041 is in the 61st percentile among its peer group of 1,595 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 0.1 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

Patch Available

Vendor Patches (1)

mozillapatch availablevia nvd_reference
View patch

References

lists.fedoraproject.org / pipermail/package-announce/2014-May/132332.html
Third Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2014-May/132437.html
Third Party Advisory
packetstormsecurity.com / files/161696/Mozilla-Arbitrary-Code-Execution-Privilege-Escalation.html
Third Party AdvisoryVDB Entry
bugzilla.mozilla.org / show_bug.cgi
ExploitIssue TrackingPatchVendor Advisory
seclists.org / fulldisclosure/2021/Mar/14
Mailing ListThird Party Advisory
secunia.com / advisories/59866
Third Party Advisory
security.gentoo.org / glsa/201504-01
Third Party Advisory
mozilla.org / security/announce/2014/mfsa2014-35.html
Vendor Advisory
oracle.com / technetwork/topics/security/bulletinapr2016-2952098.html
Third Party Advisory
securitytracker.com / id/1030163
Third Party AdvisoryVDB Entry