CVE-2018-12824 [Medium] | Out-of-bounds Read in Flash Player Desktop Runtime

CVE-2018-12824 is rated Moderate Risk (61.9/100): CVSS Medium severity, with high exploitation likelihood (EPSS 10.85%, 95th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +8.52% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	2.34%	10.85%	+8.52%
2	2026-03-15	2.46%	2.34%	-0.12%
3	2026-02-25	—	2.46%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

2.34%

10.85%

+8.52%

2026-03-15

2.46%

2.34%

-0.12%

2026-02-25

—

2.46%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.9	3.0	MEDIUM	`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N` 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:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. 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:N) Data isn’t meaningfully altered or forged. Availability (A:N) Service keeps running; no real outage angle.	2.2	3.6	[email protected]
4.3	2.0	MEDIUM	`AV:N/AC:M/Au:N/C:P/I:N/A:N` 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:P) Partial confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:N) No availability impact.	8.6	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.9

3.0

MEDIUM

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N 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:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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:N): Data isn’t meaningfully altered or forged.
Availability (A:N): Service keeps running; no real outage angle.

2.2

3.6

[email protected]

4.3

2.0

MEDIUM

AV:N/AC:M/Au:N/C:P/I:N/A:N 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:P): Partial confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:N): No availability impact.

8.6

2.9

[email protected]

OS Trackers for CVE-2018-12824

vendor	priority	summary	link
`redhat`	high	—	https://access.redhat.com/security/cve/CVE-2018-12824
`ubuntu`	medium	CVE-2018-12824 medium priority: Ubuntu including 2 source packages (adobe-flashplugin, flashplugin-nonfree), 8 status rows across 4 suites (bionic, trusty, upstream, xenial): released 8.	https://ubuntu.com/security/CVE-2018-12824

Affected software / configurations for CVE-2018-12824

Vendor	Product	Version	Raw CPE
adobe	flash_player_desktop_runtime	<= 30.0.0.154	cpe:2.3:a:adobe:flash_player_desktop_runtime::::::::
adobe	flash_player	<= 30.0.0.154	cpe:2.3:a:adobe:flash_player::::::chrome::*
adobe	flash_player	<= 30.0.0.154	cpe:2.3:a:adobe:flash_player::::::edge::*
adobe	flash_player	<= 30.0.0.154	cpe:2.3:a:adobe:flash_player::::::internet_explorer_11::*
redhat	enterprise_linux_desktop	6.0	cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:::::::*
redhat	enterprise_linux_server	6.0	cpe:2.3:o:redhat:enterprise_linux_server:6.0:::::::*
redhat	enterprise_linux_workstation	6.0	cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:::::::*

References for CVE-2018-12824

URL	Tags
http://www.securityfocus.com/bid/105066	Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1041448	Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2018:2435	Third Party Advisory
https://helpx.adobe.com/security/products/flash-player/apsb18-25.html	Patch Vendor Advisory

URL

CVE-2018-12824

Exploit prediction scoring system (EPSS) score for CVE-2018-12824

Common vulnerability scoring system (CVSS) metrics for CVE-2018-12824

Weakness enumeration for CVE-2018-12824

OS Trackers for CVE-2018-12824

Affected software / configurations for CVE-2018-12824

References for CVE-2018-12824