CVE-2016-4161 [Critical] | Memory Corruption in Flash Player

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-2016-4115, CVE-2016-4120, CVE-2016-4160, CVE-2016-4162, and CVE-2016-4163.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-04-27	3.18%	5.16%	+1.98%
2	2025-11-17	2.36%	3.18%	+0.81%
3	2025-03-30	—	2.36%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-04-27

3.18%

5.16%

+1.98%

2025-11-17

2.36%

3.18%

+0.81%

2025-03-30

—

2.36%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
9.8	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	5.9	[email protected]
7.5	2.0	HIGH	`AV:N/AC:L/Au:N/C:P/I:P/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:P) Partial availability impact.	10.0	6.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

9.8

3.1

CRITICAL

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

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

5.9

[email protected]

7.5

2.0

HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:P): Partial confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:P): Partial availability impact.

10.0

6.4

[email protected]

OS Trackers for CVE-2016-4161

vendor	priority	summary	link
`gentoo`	normal	CVE-2016-4161: 1 GLSA(s) (201606-08), 1 atom(s) (www-plugins/adobe-flash); latest impact normal.	https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-4161
`redhat`	critical	—	https://access.redhat.com/security/cve/CVE-2016-4161
`ubuntu`	medium	CVE-2016-4161 medium priority: Ubuntu including 2 source packages (adobe-flashplugin, flashplugin-nonfree), 10 status rows across 5 suites (precise, trusty, upstream, wily, xenial): released 8, needs-triage 2.	https://ubuntu.com/security/CVE-2016-4161

Affected software / configurations for CVE-2016-4161

Vendor	Product	Version	Raw CPE
adobe	flash_player	<= 21.0.0.241	cpe:2.3:a:adobe:flash_player::::::edge::*
adobe	flash_player	<= 21.0.0.241	cpe:2.3:a:adobe:flash_player::::::internet_explorer::*
adobe	flash_player	<= 18.0.0.343	cpe:2.3:a:adobe:flash_player:::::esr:::*
adobe	air_sdk_\&_compiler	<= 21.0.0.198	cpe:2.3:a:adobe:air_sdk_\&_compiler::::::::
adobe	air_sdk	<= 21.0.0.198	cpe:2.3:a:adobe:air_sdk::::::::
adobe	flash_player	<= 11.2.202.616	cpe:2.3:a:adobe:flash_player::::::::
adobe	flash_player	<= 21.0.0.216	cpe:2.3:a:adobe:flash_player::::::chrome::*
adobe	flash_player_desktop_runtime	<= 21.0.0.226	cpe:2.3:a:adobe:flash_player_desktop_runtime::::::::
adobe	air_desktop_runtime	<= 21.0.0.198	cpe:2.3:a:adobe:air_desktop_runtime::::::::

References for CVE-2016-4161

URL	Tags
http://rhn.redhat.com/errata/RHSA-2016-1079.html	Third Party Advisory
http://www.securityfocus.com/bid/90618	Broken Link Third Party Advisory VDB Entry
https://helpx.adobe.com/security/products/flash-player/apsb16-15.html	Patch Vendor Advisory
https://security.gentoo.org/glsa/201606-08	Third Party Advisory

URL

CVE-2016-4161

Exploit prediction scoring system (EPSS) score for CVE-2016-4161

Common vulnerability scoring system (CVSS) metrics for CVE-2016-4161

Weakness enumeration for CVE-2016-4161

OS Trackers for CVE-2016-4161

Affected software / configurations for CVE-2016-4161

References for CVE-2016-4161