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CVE-2016-4121

36
FAUCET Score

CVE-2016-4121 is a critical use-after-free vulnerability affecting Adobe Flash Player on Windows, OS X, and Linux, allowing attackers to execute arbitrary code. With a CVSS score of 9.8, it presents a high risk due to its network-based attack vector and complete compromise of confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 21.0.0.241CPE matchmatch criteria
cpe:2.3:a:adobe:flash_player:*:*:*:*:*:edge:*:*
<= 21.0.0.241CPE matchmatch criteria
cpe:2.3:a:adobe:flash_player:*:*:*:*:*:internet_explorer:*:*
<= 18.0.0.343CPE matchmatch criteria
cpe:2.3:a:adobe:flash_player:*:*:*:*:esr:*:*:*
<= 21.0.0.198CPE matchmatch criteria
cpe:2.3:a:adobe:air_sdk_\&_compiler:*:*:*:*:*:*:*:*
<= 21.0.0.198CPE matchmatch criteria
cpe:2.3:a:adobe:air_sdk:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/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
3.1

Exploit Intelligence

EPSS Score
10.00%
Probability of exploitation in next 30 days
EPSS Percentile
95.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.1000 is in the 91st percentile among its peer group of 36,833 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

Patch Available

Vendor Patches (3)

adobepatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5 SupplementaryFixed in: flash-plugin-0:11.2.202.621-1.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6 SupplementaryFixed in: flash-plugin-0:11.2.202.621-1.el6_8
View patch

Vendor Advisories (1)

redhatCVE-2016-4121Critical

flash-plugin: multiple code execution issues fixed in APSB16-15

May 10, 2016

References

rhn.redhat.com / errata/RHSA-2016-1079.html
Third Party Advisory
helpx.adobe.com / security/products/flash-player/apsb16-15.html
PatchVendor Advisory
security.gentoo.org / glsa/201606-08
Third Party Advisory
securityfocus.com / bid/90797
Broken LinkThird Party AdvisoryVDB Entry