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CVE-2018-4878

96
FAUCET Score

CVE-2018-4878 is a critical use-after-free vulnerability in Adobe Flash Player versions prior to 28.0.0.161, stemming from a dangling pointer in the Primetime SDK. This flaw affects a wide range of products across Adobe, Apple, Google, Linux, Microsoft, and Red Hat. With a CVSS score of 7.8 (High) and an EPSS score indicating high exploitability, successful exploitation can lead to arbitrary code execution. This vulnerability has been actively exploited in the wild, including in known ransomware campaigns, and multiple public exploits are available on ExploitDB. The high volume of community discussion and media coverage underscores its significant impact and widespread attention.

Impacted Technologies

VendorProductVersion(s)CPE
< 28.0.0.161CPE matchmatch criteria
cpe:2.3:a:adobe:flash_player:*:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*
< 28.0.0.161CPE matchmatch criteria
cpe:2.3:a:adobe:flash_player:*:*:*:*:*:edge:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
89.53%
Probability of exploitation in next 30 days
EPSS Percentile
99.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Added to KEV · Nov 3, 2021
ExploitDB: EDB-44412 · Apr 6, 2018
This CVE's current EPSS score of 0.8953 is in the 100th percentile among its peer group of 11,616 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6 SupplementaryFixed in: flash-plugin-0:28.0.0.161-1.el6_9
View patch
adobevendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2018-4878Critical

flash-plugin: use-after-free causing remote code execution (APSB18-03)

Feb 1, 2018

References

github.com / cisagov/vulnrichment/issues/196
Issue Tracking
cisa.gov / known-exploited-vulnerabilities-catalog
Third Party AdvisoryUS Government Resource
blog.talosintelligence.com / 2018/02/group-123-goes-wild.html
Technical DescriptionThird Party Advisory
access.redhat.com / errata/RHSA-2018:0285
Third Party Advisory
blog.morphisec.com / flash-exploit-cve-2018-4878-spotted-in-the-wild-massive-malspam-campaign
Third Party Advisory
github.com / InQuest/malware-samples/tree/master/CVE-2018-4878-Adobe-Flash-DRM-UAF-0day
Third Party Advisory
github.com / vysec/CVE-2018-4878
Third Party Advisory
helpx.adobe.com / security/products/flash-player/apsb18-03.html
Vendor Advisory
securingtomorrow.mcafee.com / mcafee-labs/hackers-bypassed-adobe-flash-protection-mechanism
ExploitThird Party Advisory
threatpost.com / adobe-flash-player-zero-day-spotted-in-the-wild/129742
Third Party Advisory
darkreading.com / threat-intelligence/adobe-flash-vulnerability-reappears-in-malicious-word-files/d/d-id/1331139
Press/Media CoverageThird Party Advisory
exploit-db.com / exploits/44412
ExploitThird Party AdvisoryVDB Entry
fireeye.com / blog/threat-research/2018/02/attacks-leveraging-adobe-zero-day.html
Third Party Advisory
trendmicro.com / vinfo/us/security/news/vulnerabilities-and-exploits/north-korean-hackers-allegedly-exploit-adobe-flash-player-vulnerability-cve-2018-4878-against-south-korean-targets
Technical DescriptionThird Party Advisory
securityfocus.com / bid/102893
Broken Link
securitytracker.com / id/1040318
Broken Link