CVE-2016-4171

Name: CVE-2016-4171
Creator: NVD / NIST
Published: 2016-06-16T14:59:51.017+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 19.90%

Last modified Jun 17, 2026

CVE-2016-4171 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Unspecified vulnerability in Adobe Flash Player 21.0.0.242 and earlier allows remote attackers to execute arbitrary code via unknown vectors, as exploited in the wild in June 2016.. CISA has confirmed active exploitation in the wild. EPSS estimates a 19.90% chance of exploitation in the next 30 days.

Description

Unspecified vulnerability in Adobe Flash Player 21.0.0.242 and earlier allows remote attackers to execute arbitrary code via unknown vectors, as exploited in the wild in June 2016.

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

19.90%

97.1th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Apr 15, 2022.

Affected Software

Vendor	Product	Versions
Adobe	Flash Player	<= 11.2.202.621
Adobe	Flash Player	<= 21.0.0.242
Adobe	Flash Player	<= 18.0.0.352
Redhat	Enterprise Linux Desktop	5.0
Redhat	Enterprise Linux Desktop	6.0
Redhat	Enterprise Linux Server	5.0
Redhat	Enterprise Linux Server	6.0
Redhat	Enterprise Linux Workstation	5.0
Redhat	Enterprise Linux Workstation	6.0
Opensuse	Opensuse	13.1
Opensuse	Opensuse	13.2
Suse	Linux Enterprise Desktop	12
Suse	Linux Enterprise Workstation Extension	12

References

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00031.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00035.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00038.htmlMailing List, Third Party Advisory
http://www.securityfocus.com/bid/91184Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1036094Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2016:1238Third Party Advisory
https://helpx.adobe.com/security/products/flash-player/apsa16-03.htmlVendor Advisory
https://helpx.adobe.com/security/products/flash-player/apsb16-18.htmlVendor Advisory
https://security.gentoo.org/glsa/201606-08Third Party Advisory
https://www.kb.cert.org/vuls/id/748992Third Party Advisory, US Government Resource
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00031.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00035.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00038.htmlMailing List, Third Party Advisory
http://www.securityfocus.com/bid/91184Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1036094Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2016:1238Third Party Advisory
https://helpx.adobe.com/security/products/flash-player/apsa16-03.htmlVendor Advisory
https://helpx.adobe.com/security/products/flash-player/apsb16-18.htmlVendor Advisory
https://security.gentoo.org/glsa/201606-08Third Party Advisory
https://www.kb.cert.org/vuls/id/748992Third Party Advisory, US Government Resource
https://github.com/cisagov/vulnrichment/issues/196Issue Tracking
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-4171US Government Resource

Timeline

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

Frequently Asked Questions

What is CVE-2016-4171?

Unspecified vulnerability in Adobe Flash Player 21.0.0.242 and earlier allows remote attackers to execute arbitrary code via unknown vectors, as exploited in the wild in June 2016.

How severe is CVE-2016-4171?

CVE-2016-4171 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 19.90% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2016-4171?

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-2016-4171?

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

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Source: NVD / NIST