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CVE-2016-5295

24
FAUCET Score

CVE-2016-5295 is a privilege escalation vulnerability affecting Mozilla Firefox on Windows operating systems, specifically versions prior to 50. An attacker with local system access could leverage the Mozilla Maintenance Service to invoke the Mozilla Updater and execute malicious local files. This vulnerability has a CVSS score of 7.8 (High), indicating a significant impact with high confidentiality, integrity, and availability compromise, but it requires local access and low privileges. There is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or KEV entry, and community discussion and media coverage are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
< 50.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 50CPE match
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.33%
Probability of exploitation in next 30 days
EPSS Percentile
25.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0033 is in the 63rd percentile among its peer group of 17,061 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

mozillavendor investigatingvia nvd_reference
View patch

References

bugzilla.mozilla.org / show_bug.cgi
Issue TrackingVendor Advisory
mozilla.org / en-US/security/advisories/mfsa2013-44
Vendor Advisory
mozilla.org / security/advisories/mfsa2016-89
Vendor Advisory
securityfocus.com / bid/94337
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037298
Third Party AdvisoryVDB Entry