CVE-2018-4878
Published 2018-02-06 · Updated 2026-06-17 · Source psirt@adobe.com
Summary
CVE-2018-4878 is a high-severity (CVSS 7.8) vulnerability in Adobe Flash Player. CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by May 3, 2022. CISA also lists it as known to be used in ransomware campaigns, so it should be prioritised accordingly. Adobe has 83 vulnerabilities in the KEV catalog, 11 of them linked to ransomware.
All 83 known-exploited Adobe vulnerabilities →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.
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: Adobe — Flash Player
Name: Adobe Flash Player Use-After-Free Vulnerability
Date added: 2021-11-03 · Due: 2022-05-03
Required action: The impacted product is end-of-life and should be disconnected if still in use.
References
- http://blog.talosintelligence.com/2018/02/group-123-goes-wild.html
- http://www.securityfocus.com/bid/102893
- http://www.securitytracker.com/id/1040318
- 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://github.com/InQuest/malware-samples/tree/master/CVE-2018-4878-Adobe-Flash-DRM-UAF-0day
- https://github.com/vysec/CVE-2018-4878
- https://helpx.adobe.com/security/products/flash-player/apsb18-03.html