# CVE-2018-4878: Adobe Flash Player Use-After-Free Vulnerability

> CVE-2018-4878: Adobe Flash Player Use-After-Free Vulnerability. CVSS 7.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2018-4878
Last updated: 2025-11-17T19:33:19Z

- Published: 2018-02-06 20:00 UTC · Updated: 2025-11-17 19:33 UTC · Assigner: adobe
- CVSS: 7.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS: 90.3%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2021-11-03, federal due date 2022-05-03, ransomware use: Known

## 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.

## CISA required action

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

## Affected vendors and products

- n/a: Adobe Flash Player before 28.0.0.161

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2018-4878)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2018-4878)
- [http://blog.talosintelligence.com/2018/02/group-123-goes-wild.html](http://blog.talosintelligence.com/2018/02/group-123-goes-wild.html)
- [https://access.redhat.com/errata/RHSA-2018:0285](https://access.redhat.com/errata/RHSA-2018:0285)
- [https://blog.morphisec.com/flash-exploit-cve-2018-4878-spotted-in-the-wild-massive-malspam-campaign](https://blog.morphisec.com/flash-exploit-cve-2018-4878-spotted-in-the-wild-massive-malspam-campaign)
- [https://github.com/InQuest/malware-samples/tree/master/CVE-2018-4878-Adobe-Flash-DRM-UAF-0day](https://github.com/InQuest/malware-samples/tree/master/CVE-2018-4878-Adobe-Flash-DRM-UAF-0day)
- [https://github.com/vysec/CVE-2018-4878](https://github.com/vysec/CVE-2018-4878)
- [https://helpx.adobe.com/security/products/flash-player/apsb18-03.html](https://helpx.adobe.com/security/products/flash-player/apsb18-03.html)
- [https://securingtomorrow.mcafee.com/mcafee-labs/hackers-bypassed-adobe-flash-protection-mechanism/](https://securingtomorrow.mcafee.com/mcafee-labs/hackers-bypassed-adobe-flash-protection-mechanism/)
- [https://threatpost.com/adobe-flash-player-zero-day-spotted-in-the-wild/129742/](https://threatpost.com/adobe-flash-player-zero-day-spotted-in-the-wild/129742/)
- [https://www.darkreading.com/threat-intelligence/adobe-flash-vulnerability-reappears-in-malicious-word-files/d/d-id/1331139](https://www.darkreading.com/threat-intelligence/adobe-flash-vulnerability-reappears-in-malicious-word-files/d/d-id/1331139)
- [https://www.exploit-db.com/exploits/44412/](https://www.exploit-db.com/exploits/44412/)
- [https://www.fireeye.com/blog/threat-research/2018/02/attacks-leveraging-adobe-zero-day.html](https://www.fireeye.com/blog/threat-research/2018/02/attacks-leveraging-adobe-zero-day.html)
- [https://www.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](https://www.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)
- [http://www.securityfocus.com/bid/102893](http://www.securityfocus.com/bid/102893)
- [http://www.securitytracker.com/id/1040318](http://www.securitytracker.com/id/1040318)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2018-4878 · Markdown: https://rewindex.com/cve/CVE-2018-4878.md · JSON: https://rewindex.com/api/v1/cves/CVE-2018-4878 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:45:44.371Z