CVE-2016-4121

Name: CVE-2016-4121
Creator: NVD / NIST
Published: 2016-06-16T14:59:01.637+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 10.00%

Last modified Jun 17, 2026

CVE-2016-4121 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Use-after-free vulnerability in Adobe Flash Player before 18.0.0.352 and 19.x through 21.x before 21.0.0.242 on Windows and OS X and before 11.2.202.621 on Linux allows attackers to execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2016-1097, CVE-2016-1106, CVE-2016-1107, CVE-2016-1108, CVE-2016-1109, CVE-2016-1110, CVE-2016-4108, and CVE-2016-4110.. EPSS estimates a 10.00% chance of exploitation in the next 30 days.

Description

Use-after-free vulnerability in Adobe Flash Player before 18.0.0.352 and 19.x through 21.x before 21.0.0.242 on Windows and OS X and before 11.2.202.621 on Linux allows attackers to execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2016-1097, CVE-2016-1106, CVE-2016-1107, CVE-2016-1108, CVE-2016-1109, CVE-2016-1110, CVE-2016-4108, and CVE-2016-4110.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

10.00%

95.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Adobe	Flash Player	<= 21.0.0.241
Adobe	Flash Player	<= 18.0.0.343
Adobe	Air Sdk \& Compiler	<= 21.0.0.198
Adobe	Air Sdk	<= 21.0.0.198
Adobe	Flash Player	<= 11.2.202.616
Adobe	Flash Player	<= 21.0.0.216
Adobe	Flash Player Desktop Runtime	<= 21.0.0.226
Adobe	Air Desktop Runtime	<= 21.0.0.198

References

http://rhn.redhat.com/errata/RHSA-2016-1079.htmlThird Party Advisory
http://www.securityfocus.com/bid/90797Broken Link, Third Party Advisory, VDB Entry
https://helpx.adobe.com/security/products/flash-player/apsb16-15.htmlPatch, Vendor Advisory
https://security.gentoo.org/glsa/201606-08Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-1079.htmlThird Party Advisory
http://www.securityfocus.com/bid/90797Broken Link, Third Party Advisory, VDB Entry
https://helpx.adobe.com/security/products/flash-player/apsb16-15.htmlPatch, Vendor Advisory
https://security.gentoo.org/glsa/201606-08Third Party Advisory

Timeline

Published: Jun 16, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-4121?

How severe is CVE-2016-4121?

CVE-2016-4121 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 10.00% probability of exploitation in the next 30 days.

How do I fix CVE-2016-4121?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-4121?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST