What is the CVSS score of CVE-2018-4878?

CVE-2018-4878 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 93.4%.

Which versions of Adobe Flash Player are affected by CVE-2018-4878?

Organizations using Adobe Flash Player face notable risk from CVE-2018-4878, a use-after-free vulnerability rated CVSS 7.8. Exploitation could compromise the security of affected deployments.

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

Yes, a public proof-of-concept exploit is available for CVE-2018-4878. Prioritise patching immediately. EPSS: 93.4%.

How to fix or mitigate CVE-2018-4878?

Within 24 hours: Identify all affected systems running Adobe Flash Player and apply vendor patches immediately. If patching is delayed, consider network segmentation to limit exposure.

Adobe Flash Player CVE-2018-4878

HIGH

Use After Free (CWE-416)

2018-02-06 psirt@adobe.com

7.8

CVSS 3.1

CVSS VectorNVD

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

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 26, 2026 - 11:18 vuln.today

Added to CISA KEV

Nov 18, 2025 - 17:03 cisa

CISA KEV

PoC Detected

Nov 18, 2025 - 17:03 vuln.today

Public exploit code

CVE Published

Feb 06, 2018 - 21:29 nvd

HIGH 7.8

DescriptionNVD

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.

AnalysisAI

Adobe Flash Player contains a use-after-free vulnerability in the Primetime SDK's media player listener handling, exploited as a zero-day in January-February 2018 by North Korean APT groups in targeted attacks.

Technical ContextAI

The CWE-416 use-after-free occurs when the Primetime SDK's media player frees a listener object while still referenced. Accessing the dangling pointer allows attackers to control execution flow through heap manipulation.

Affected ProductsAI

Adobe Flash Player before 28.0.0.161 (all platforms)

RemediationAI

Flash Player is end-of-life. Remove completely from all systems. This vulnerability accelerated the industry consensus to deprecate Flash.

CVE-2018-4878 vulnerability details – vuln.today

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Adobe Flash Player CVE-2018-4878

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

Technical ContextAI

Affected ProductsAI

RemediationAI

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External POC / Exploit Code