CVE-2016-1031 [High] | Use-After-Free in Flash Player

Use-after-free vulnerability in Adobe Flash Player before 18.0.0.343 and 19.x through 21.x before 21.0.0.213 on Windows and OS X and before 11.2.202.616 on Linux allows attackers to execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2016-1011, CVE-2016-1013, CVE-2016-1016, and CVE-2016-1017.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-01-31	2.25%	2.89%	+0.64%
2	2026-01-27	4.55%	2.25%	-2.30%
3	2025-03-30	—	4.55%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-01-31

2.25%

2.89%

+0.64%

2026-01-27

4.55%

2.25%

-2.30%

2025-03-30

—

4.55%

—

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-2016-1031

vendor	priority	summary	link
`redhat`	critical	—	https://access.redhat.com/security/cve/CVE-2016-1031
`ubuntu`	medium	CVE-2016-1031 medium priority: Ubuntu including 2 source packages (adobe-flashplugin, flashplugin-nonfree), 8 status rows across 4 suites (precise, trusty, upstream, wily): released 7, needs-triage 1.	https://ubuntu.com/security/CVE-2016-1031

Affected software / configurations for CVE-2016-1031

Vendor	Product	Version	Raw CPE
adobe	flash_player	<= 11.2.202.577	cpe:2.3:a:adobe:flash_player::::::::
adobe	flash_player_desktop_runtime	<= 21.0.0.197	cpe:2.3:a:adobe:flash_player_desktop_runtime::::::::
adobe	flash_player	<= 18.0.0.333	cpe:2.3:a:adobe:flash_player:::::esr:::*
adobe	flash_player	<= 21.0.0.197	cpe:2.3:a:adobe:flash_player::::::internet_explorer::*
adobe	flash_player	<= 21.0.0.197	cpe:2.3:a:adobe:flash_player::::::chrome::*
adobe	flash_player	<= 21.0.0.197	cpe:2.3:a:adobe:flash_player::::::edge::*
adobe	air_desktop_runtime	<= 21.0.0.176	cpe:2.3:a:adobe:air_desktop_runtime::::::::
adobe	air_sdk	<= 21.0.0.176	cpe:2.3:a:adobe:air_sdk::::::::
adobe	air_sdk_\&_compiler	<= 21.0.0.176	cpe:2.3:a:adobe:air_sdk_\&_compiler::::::::

References for CVE-2016-1031

URL	Tags
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00044.html	Broken Link Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00045.html	Broken Link Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0610.html	Third Party Advisory
http://www.securityfocus.com/bid/85926	Broken Link Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1035509	Broken Link Third Party Advisory VDB Entry
https://helpx.adobe.com/security/products/flash-player/apsb16-10.html	Patch Vendor Advisory

URL

CVE-2016-1031

Exploit prediction scoring system (EPSS) score for CVE-2016-1031

Common vulnerability scoring system (CVSS) metrics for CVE-2016-1031

Weakness enumeration for CVE-2016-1031

OS Trackers for CVE-2016-1031

Affected software / configurations for CVE-2016-1031

References for CVE-2016-1031