Which products and versions are affected by CVE-2018-4878?

Affected: Flash Player (Adobe); Enterprise Linux Desktop (Redhat) versions 6.0; Enterprise Linux Server (Redhat) versions 6.0, among others. The full list is in the CVE brief.

Is CVE-2018-4878 being exploited in the wild?

It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Feb 3, 2018 and is known to be used in ransomware campaigns.

Is CVE-2018-4878 in the CISA KEV catalog?

Yes. It was added on Nov 3, 2021 with a federal remediation due date of May 3, 2022.

Is there a public exploit for CVE-2018-4878?

Public exploit code is available.

How urgently should CVE-2018-4878 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2018-4878

HighExploitedPublic exploit

A use-after-free vulnerability was discovered in Adobe Flash Player before 28.0.0.161.

Published Feb 6, 2018 · Updated Nov 20, 2025 · Also known as UBUNTU-CVE-2018-4878

Key Facts

Patch immediately

CVE-2018-4878 is a high-severity vulnerability (CVSS 7.8 v3.1) affecting Flash Player (Adobe), Enterprise Linux Desktop (Redhat), Enterprise Linux Server (Redhat) and 4 more products.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Feb 3, 2018 and is known to be used in ransomware campaigns. Public exploit code is available.
EPSS estimates a 90% probability of exploitation in the next 30 days.
Fixed versions are available, including Flash Player 28.0.0.161, flash-plugin 0:28.0.0.161-1.el6_9, flashplugin-nonfree 28.0.0.161ubuntu0.14.04.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

7.8

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

EPSS (30-day exploit likelihood)

90%

Higher than 99.7% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings, used by ransomware

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2018-4878 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

A use-after-free vulnerability was discovered in Adobe Flash Player before 28.0.0.161. This vulnerability occurs due to a dangling pointer in the Primetime SDK related to media player handling of listener objects. A successful attack can lead to arbitrary code execution. This was exploited in the wild in January and February 2018.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CISA KEV	Nov 3, 2021	May 3, 2022	Known
Industry KEV feed	Feb 3, 2018	May 3, 2022	Known
CIRCL KEV	Nov 3, 2021	May 3, 2022	Known
ENISA EUVD	Nov 3, 2021	n/a	Not reported

Required action: The impacted product is end-of-life and should be disconnected if still in use.

Affected Products

11 affected entries in total

Product	Affected versions	Fixed in
Flash PlayerAdobe	See advisory	28.0.0.161
Enterprise Linux DesktopRedhat	6.0	n/a
Enterprise Linux ServerRedhat	6.0	n/a
Enterprise Linux WorkstationRedhat	6.0	n/a
flashplugin-nonfreeubuntu	See advisory	28.0.0.161ubuntu0.14.04.1

2 more affected products in the full CVE brief

Patched Releases

Flash Player

28.0.0.161

flash-plugin

0:28.0.0.161-1.el6_9

flashplugin-nonfree

28.0.0.161ubuntu0.14.04.1, 28.0.0.161ubuntu0.16.04.1

Timeline

Added to Industry KEV feed
Feb 3, 2018
Publicly disclosed
Feb 6, 2018
Added to CISA KEV
Nov 3, 2021
Added to CIRCL KEV
Nov 3, 2021
Added to ENISA EUVD
Nov 3, 2021
Last updated
Nov 20, 2025

Weakness Type

CWE-416 Use After Free

References

15 more references in the full CVE brief

FAQ

Common Questions.

A use-after-free vulnerability was discovered in Adobe Flash Player before 28.0.0.161.
Affected: Flash Player (Adobe); Enterprise Linux Desktop (Redhat) versions 6.0; Enterprise Linux Server (Redhat) versions 6.0, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Feb 3, 2018 and is known to be used in ransomware campaigns.
Yes. It was added on Nov 3, 2021 with a federal remediation due date of May 3, 2022.
Public exploit code is available.
Fixed versions are available, including Flash Player 28.0.0.161, flash-plugin 0:28.0.0.161-1.el6_9, flashplugin-nonfree 28.0.0.161ubuntu0.14.04.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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