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CVE-2016-5287

31
FAUCET Score

CVE-2016-5287 describes a critical use-after-free vulnerability in Mozilla Firefox versions prior to 49.0.2, specifically impacting actor destruction with service workers. This flaw carries a CVSS v3 score of 9.8 (Critical), indicating a network-exploitable vulnerability with low attack complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. While highly severe, 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
< 49.0.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.43%
Probability of exploitation in next 30 days
EPSS Percentile
82.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0243 is in the 72nd percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Vendor Advisories (1)

redhatCVE-2016-5287Important

firefox: Crash in nsTArray_base

Oct 20, 2016

References

bugzilla.mozilla.org / show_bug.cgi
Issue TrackingVendor Advisory
mozilla.org / security/advisories/mfsa2016-87
Vendor Advisory
securityfocus.com / bid/93811
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037077
Third Party AdvisoryVDB Entry