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Vulnerability record · CVE-2016-4121 · published 16 June 2016

CVE-2016-4121: Adobe flash player use after free vulnerability

Adobe · Flash Player

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.

9.8 CVSS 3.1 Critical EPSS 10% · top 4.5% CWE-416 · Use after free
9.8CVSS 3.1 base score, v2 7.5
10%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

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.

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

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2016-4171Adobe Flash Player unspecified remote code execution flawCVE-2016-4171 is an unspecified vulnerability in Adobe Flash Player 21.0.0.242 and earlier that allows remote attackers to execute arbitrary code thr…KEVEPSS 20%analysed9.8CVE-2016-4117Adobe Flash Player unspecified vectors allow arbitrary code executionAdobe Flash Player 21.0.0.226 and earlier contains a critical flaw that lets remote attackers execute arbitrary code through unspecified vectors. Ado…KEVEPSS 94%analysed9.8CVE-2016-1019Adobe Flash Player memory corruption allows code executionAdobe Flash Player 21.0.0.197 and earlier contains an unspecified memory corruption flaw that can crash the application or allow arbitrary code execu…KEVEPSS 22%analysed9.8CVE-2015-5123Adobe Flash Player ActionScript 3 BitmapData use-after-freeAdobe Flash Player contains a use-after-free in the ActionScript 3 BitmapData class, triggered by crafted Flash content that overrides a valueOf func…KEVEPSS 19%analysed9.8CVE-2015-5122Adobe Flash Player ActionScript 3 Use-After-Free in DisplayObjectA use-after-free flaw in the DisplayObject class of Adobe Flash Player's ActionScript 3 implementation is triggered by crafted Flash content that mis…KEVEPSS 94%analysed9.8CVE-2015-5119Adobe Flash Player ActionScript 3 ByteArray use-after-freeA use-after-free flaw exists in the ByteArray class of the ActionScript 3 implementation in Adobe Flash Player. Crafted Flash content that overrides …KEVEPSS 99%analysed9.8CVE-2015-3113Adobe Flash Player heap buffer overflow allows remote code executionAdobe Flash Player contains a heap-based buffer overflow (CWE-122/CWE-787) reachable through unspecified vectors. It affects Flash Player before 13.0…KEVEPSS 100%analysed9.8CVE-2015-3043Adobe Flash Player memory corruption allows arbitrary code executionAdobe Flash Player contains an out-of-bounds write (CWE-787) that corrupts memory and can lead to arbitrary code execution or a denial of service. Th…KEVEPSS 74%analysed

Source: NIST National Vulnerability Database (record CVE-2016-4121), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.