CVE-2016-4176 [High] | Out-of-bounds Write in Flash Player Desktop Runtime

CVE-2016-4176 is rated High Exploit Risk (89.4/100): CVSS High severity, with high exploitation likelihood (EPSS 48.23%, 98th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +7.18% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

EDB-ID	Source	Kind	Published	Link
40105	exploit_db	edb	2016-07-13	Exploit-DB ↗
—	nvd_ref	exploit_tag		Exploit-DB ↗

EDB-ID

Source

Kind

Published

Link

40105

exploit_db

edb

2016-07-13

Exploit-DB ↗

—

nvd_ref

exploit_tag

Exploit-DB ↗

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-01-30	41.05%	48.23%	+7.18%
2	2026-01-21	41.36%	41.05%	-0.32%
3	2025-09-03	—	41.36%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-01-30

41.05%

48.23%

+7.18%

2026-01-21

41.36%

41.05%

-0.32%

2025-09-03

—

41.36%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.8	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. 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.	2.8	5.9	[email protected]
9.3	2.0	HIGH	`AV:N/AC:M/Au:N/C:C/I:C/A:C` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. Authentication (AU:N) No authentication is required. Confidentiality impact (C:C) Complete confidentiality impact. Integrity impact (I:C) Complete integrity impact. Availability impact (A:C) Complete availability impact.	8.6	10.0	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.8

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
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.

2.8

5.9

[email protected]

9.3

2.0

HIGH

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

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:M): Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:C): Complete confidentiality impact.
Integrity impact (I:C): Complete integrity impact.
Availability impact (A:C): Complete availability impact.

8.6

10.0

[email protected]

OS Trackers for CVE-2016-4176

vendor	priority	summary	link
`redhat`	critical	—	https://access.redhat.com/security/cve/CVE-2016-4176
`suse`	high	CVE-2016-4176 severity important: SUSE including 2 source package names (flash-player-11.2.202.632-137.1, flash-player-gnome-11.2.202.632-137.1), 4 product×package rows across 2 product lines (SUSE Linux Enterprise Desktop 12 SP1, SUSE Linux Enterprise Workstation Extension 12 SP1): Fixed 4.	https://www.suse.com/security/cve/CVE-2016-4176/
`ubuntu`	medium	CVE-2016-4176 medium priority: Ubuntu including 2 source packages (adobe-flashplugin, flashplugin-nonfree), 10 status rows across 5 suites (precise, trusty, upstream, wily, xenial): released 10.	https://ubuntu.com/security/CVE-2016-4176

Affected software / configurations for CVE-2016-4176

Vendor	Product	Version	Raw CPE
adobe	flash_player_desktop_runtime	<= 22.0.0.192	cpe:2.3:a:adobe:flash_player_desktop_runtime::::::::
adobe	flash_player	<= 18.0.0.360	cpe:2.3:a:adobe:flash_player:::::esr:::*
adobe	flash_player	<= 22.0.0.192	cpe:2.3:a:adobe:flash_player::::::chrome::*
adobe	flash_player	<= 22.0.0.192	cpe:2.3:a:adobe:flash_player::::::edge::*
adobe	flash_player	<= 22.0.0.192	cpe:2.3:a:adobe:flash_player::::::internet_explorer::*
adobe	flash_player	<= 11.2.202.626	cpe:2.3:a:adobe:flash_player::::::::

References for CVE-2016-4176

URL	Tags
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00016.html	Broken Link
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00017.html	Broken Link
http://www.securityfocus.com/bid/91721	Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1036280	Broken Link Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2016:1423	Third Party Advisory
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-093	Patch Vendor Advisory
https://helpx.adobe.com/security/products/flash-player/apsb16-25.html	Patch Vendor Advisory
https://www.exploit-db.com/exploits/40105/	Exploit Third Party Advisory VDB Entry

URL

CVE-2016-4176

Public exploit references (Exploit-DB) for CVE-2016-4176

Exploit prediction scoring system (EPSS) score for CVE-2016-4176

Common vulnerability scoring system (CVSS) metrics for CVE-2016-4176

Weakness enumeration for CVE-2016-4176

OS Trackers for CVE-2016-4176

Affected software / configurations for CVE-2016-4176

References for CVE-2016-4176