CVE-2016-4161: 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

Q: How do I fix CVE-2016-4161?

flash player: upgrade to newer than 21.0.0.241; flash player: upgrade to newer than 21.0.0.241; flash player: upgrade to newer than 18.0.0.343. Exact commands for each OS are on this page.

Q: Is CVE-2016-4161 being exploited?

CVE-2016-4161 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2016-4161 affect?

CVE-2016-4161 affects flash player, flash player, flash player. Severity is critical (CVSS 9.8). 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 or cause a denial of service (memory corruption) via unspecified ve

Q: How urgent is CVE-2016-4161?

Priority 63/100. Critical severity; EPSS top 6%: very likely to be exploited; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADEUPGRADEUPGRADE

CVE-2016-4161 is a critical-severity flaw (CVSS 9.8) affecting flash player, flash player, flash player. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 or cause a denial of service (memory corruption) via unspecified vectors, a different vulnerability than CVE-2016-1096, CVE-2016-1098, CVE-2016-1099, CVE-2016-1100, CVE-2016-1102, CVE-2016-1104, CVE-2016-4109, CVE-2016-4111, CVE-2016-4112, CVE-2016-4113, CVE-2016-4114, CVE-201

Why this priority

Critical severity
EPSS top 6%: very likely to be exploited
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	6.3% (top 6%)
CISA exploited list	No
Weakness	CWE-119
Published	2016-06-16
Last modified	2026-06-17

Publisher (CNA): Adobe Systems Incorporated · Vendor: adobe

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2016-06-16 14:59 UTCPublished CVE record published
2026-06-17 00:47 UTCUpdated Record last modified

adobe flash player UPGRADE

Affected: <= 21.0.0.241

Fixed in: newer than 21.0.0.241

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy flash-player || rpm -q flash-player || flash-player --version

2. UPGRADE to newer than 21.0.0.241 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade flash-player

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade flash-player

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

adobe flash player UPGRADE

Affected: <= 21.0.0.241

Fixed in: newer than 21.0.0.241

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy flash-player || rpm -q flash-player || flash-player --version

2. UPGRADE to newer than 21.0.0.241 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade flash-player

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade flash-player

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

adobe flash player UPGRADE

Affected: <= 18.0.0.343 · <= 11.2.202.616

Fixed in: newer than 18.0.0.343

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy flash-player || rpm -q flash-player || flash-player --version

2. UPGRADE to newer than 18.0.0.343 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade flash-player

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade flash-player

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

adobe air sdk \& compiler UPGRADE

Affected: <= 21.0.0.198

Fixed in: newer than 21.0.0.198

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy air-sdk--compiler || rpm -q air-sdk--compiler || air-sdk--compiler --version

2. UPGRADE to newer than 21.0.0.198 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade air-sdk--compiler

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade air-sdk--compiler

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

adobe air sdk UPGRADE

Affected: <= 21.0.0.198

Fixed in: newer than 21.0.0.198

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy air-sdk || rpm -q air-sdk || air-sdk --version

2. UPGRADE to newer than 21.0.0.198 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade air-sdk

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade air-sdk

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

adobe flash player UPGRADE

Affected: <= 21.0.0.216

Fixed in: newer than 21.0.0.216

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy flash-player || rpm -q flash-player || flash-player --version

2. UPGRADE to newer than 21.0.0.216 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade flash-player

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade flash-player

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2016-4161?

flash player: upgrade to newer than 21.0.0.241; flash player: upgrade to newer than 21.0.0.241; flash player: upgrade to newer than 18.0.0.343. Exact commands for each OS are on this page.

Is CVE-2016-4161 being exploited?

CVE-2016-4161 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2016-4161 affect?

CVE-2016-4161 affects flash player, flash player, flash player. Severity is critical (CVSS 9.8). 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 or cause a denial of service (memory corruption) via unspecified ve

How urgent is CVE-2016-4161?

Priority 63/100. Critical severity; EPSS top 6%: very likely to be exploited; Remotely exploitable, no login, no user action

Software pages

Windows vulnerabilities · Adobe Flash vulnerabilities

Related CVEs

CVE-2018-15982 HIGH 7.8 EXPLOITED UPGRADE UPGRADE Adobe Flash Player Use-After-Free Vulnerability
CVE-2016-1019 CRITICAL 9.8 EXPLOITED UPGRADE UPGRADE Adobe Flash Player Arbitrary Code Execution Vulnerability
CVE-2016-4117 CRITICAL 9.8 EXPLOITED UPGRADE MITIGATE Adobe Flash Player Arbitrary Code Execution Vulnerability
CVE-2011-0627 HIGH 8.8 UPGRADE Adobe Flash Player before 10.3.181.14 on Windows, Mac OS X, Linux, and Solaris and before 10.3.185.21 on Andro
CVE-2020-9746 HIGH 7.0 UPGRADE UPGRADE Adobe Flash Player version 32.0.0.433 (and earlier) are affected by an exploitable NULL pointer dereference vu

References

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