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CVE-2018-4877

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

9.8 CriticalFix available

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's quality of service functionality. A successful attack can lead to arbitrary code execution.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

8.35%Up 1.9 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 9.8

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's quality of service functionality. A successful attack can lead to arbitrary code execution.

Record
CVE-2018-4877
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
10.0 HighAV:N/AC:L/Au:N/C:C/I:C/A:C
Weakness
CWE-416
Updated
2026-11-02
CVE List No score

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's quality of service functionality. A successful attack can lead to arbitrary code execution.

Record
CVE-2018-4877
Updated
2026-11-02
EUVDEUVD-2018-16662 No score

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's quality of service functionality. A successful attack can lead to arbitrary code execution.

Record
EUVD-2018-16662
Updated
2026-11-03
GitHub AdvisoriesGHSA-hcf8-mxwr-h337 9.8

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

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's quality of service functionality. A successful attack can lead to arbitrary code execution.

Record
GHSA-hcf8-mxwr-h337
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-416
Updated
2026-11-02
OSVRHSA-2018:0285 8.8

Red Hat Security Advisory: flash-plugin security update

Record
RHSA-2018:0285
CVSS 3.0
8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2018-4877 9.8

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's quality of service functionality. A successful attack can lead to arbitrary code execution.

Record
UBUNTU-CVE-2018-4877
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVMGASA-2018-0120 No score

Updated flash-player-plugin packages fix security vulnerability

Adobe Flash Player 28.0.0.161 addresses critical use-after-free vulnerabilities that could lead to remote code execution (CVE-2018-4877, CVE-2018-4878). Successful exploitation could potentially allow an attacker to take control of the affected system.

Adobe is aware of a report that an exploit for CVE-2018-4878 exists in the wild, and is being used in limited, targeted attacks against Windows users. These attacks leverage Office documents with embedded malicious Flash content distributed via email.

Record
MGASA-2018-0120
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
flash-player-plugin
Mageia:6
 before 28.0.0.161-1.mga6.nonfree
28.0.0.161-1.mga6.nonfree
flash-plugin
Red Hat:rhel_extras:6
 before 0:28.0.0.161-1.el6_9
0:28.0.0.161-1.el6_9
flashplugin-nonfree
Ubuntu:14.04:LTS
 before 28.0.0.161ubuntu0.14.04.1, plus listed versions
11.2.202.310ubuntu111.2.202.327ubuntu0.13.10.111.2.202.332ubuntu111.2.202.335ubuntu111.2.202.336ubuntu1
Show 45 moreShow less
11.2.202.341ubuntu111.2.202.346ubuntu111.2.202.350ubuntu111.2.202.356ubuntu0.14.04.111.2.202.359ubuntu0.14.04.111.2.202.378ubuntu0.14.04.111.2.202.394ubuntu0.14.04.111.2.202.400ubuntu0.14.04.111.2.202.406ubuntu0.14.04.111.2.202.406ubuntu0.14.04.211.2.202.411ubuntu0.14.04.111.2.202.418ubuntu0.14.04.111.2.202.424ubuntu0.14.04.111.2.202.425ubuntu0.14.04.111.2.202.429ubuntu0.14.04.111.2.202.438ubuntu0.14.04.111.2.202.440ubuntu0.14.04.111.2.202.442ubuntu0.14.04.111.2.202.451ubuntu0.14.04.111.2.202.457ubuntu0.14.04.111.2.202.460ubuntu0.14.04.111.2.202.466ubuntu0.14.04.111.2.202.468ubuntu0.14.04.111.2.202.481ubuntu0.14.04.111.2.202.481ubuntu0.14.04.211.2.202.491ubuntu0.14.04.111.2.202.508ubuntu0.14.04.111.2.202.521ubuntu0.14.04.111.2.202.535ubuntu0.14.04.111.2.202.540ubuntu0.14.04.211.2.202.548ubuntu0.14.04.111.2.202.554ubuntu0.14.04.111.2.202.559ubuntu0.14.04.111.2.202.569ubuntu0.14.04.111.2.202.577ubuntu0.14.04.111.2.202.616ubuntu0.14.04.111.2.202.621ubuntu0.14.04.111.2.202.626ubuntu0.14.04.111.2.202.632ubuntu0.14.04.111.2.202.635ubuntu0.14.04.111.2.202.637ubuntu0.14.04.111.2.202.643ubuntu0.14.04.111.2.202.644ubuntu0.14.04.124.0.0.186ubuntu0.14.04.124.0.0.194ubuntu0.14.04.1
28.0.0.161ubuntu0.14.04.1
flashplugin-nonfree
Ubuntu:16.04:LTS
 before 28.0.0.161ubuntu0.16.04.1, plus listed versions
11.2.202.540ubuntu211.2.202.548ubuntu111.2.202.554ubuntu111.2.202.559ubuntu111.2.202.569ubuntu1
Show 26 moreShow less
11.2.202.577ubuntu111.2.202.616ubuntu111.2.202.621ubuntu0.16.04.111.2.202.626ubuntu0.16.04.111.2.202.632ubuntu0.16.04.111.2.202.635ubuntu0.16.04.111.2.202.637ubuntu0.16.04.111.2.202.643ubuntu0.16.04.111.2.202.644ubuntu0.16.04.124.0.0.186ubuntu0.16.04.124.0.0.194ubuntu0.16.04.124.0.0.221ubuntu0.16.04.125.0.0.127ubuntu0.16.04.125.0.0.148ubuntu0.16.04.125.0.0.171ubuntu0.16.04.126.0.0.126ubuntu0.16.04.126.0.0.131ubuntu0.16.04.126.0.0.137ubuntu0.16.04.126.0.0.151ubuntu0.16.04.127.0.0.130ubuntu0.16.04.127.0.0.159ubuntu0.16.04.127.0.0.170ubuntu0.16.04.127.0.0.183ubuntu0.16.04.127.0.0.187ubuntu0.16.04.128.0.0.126ubuntu0.16.04.128.0.0.137ubuntu0.16.04.1
28.0.0.161ubuntu0.16.04.1

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-4877 is a critical vulnerability (CVSS 9.8) in Adobe Flash Player, published February 6, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 8.35%, the 94th percentile. Fixed in flash-player-plugin 28.0.0.161-1.mga6.nonfree.

References

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