# CVE-2018-4878

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.

- Page: https://www.vulneraibility.com/cve/CVE-2018-4878
- CVSS: 7.8
- Known exploited: yes, in CISA KEV since 2021-11-03; CISA due date 2022-05-03; known ransomware use
- EPSS: 90.28% (percentile 99.8)
- Public exploit code: 3 on Exploit-DB · 10 GitHub proofs of concept (first 2016-02-13)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2025-11-17)
- Weakness: CWE-416
- Published: 2018-02-06

## Affected versions

- Adobe Flash Player before 28.0.0.161: affected Adobe Flash Player before 28.0.0.161

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] http://blog.talosintelligence.com/2018/02/group-123-goes-wild.html
- [other] https://threatpost.com/adobe-flash-player-zero-day-spotted-in-the-wild/129742/
- [other] https://helpx.adobe.com/security/products/flash-player/apsb18-03.html
- [advisory] https://access.redhat.com/errata/RHSA-2018:0285
- [other] http://www.securitytracker.com/id/1040318
- [other] http://www.securityfocus.com/bid/102893
- [other] https://www.fireeye.com/blog/threat-research/2018/02/attacks-leveraging-adobe-zero-day.html
- [other] https://blog.morphisec.com/flash-exploit-cve-2018-4878-spotted-in-the-wild-massive-malspam-campaign
- [other] https://www.darkreading.com/threat-intelligence/adobe-flash-vulnerability-reappears-in-malicious-word-files/d/d-id/1331139
- [other] https://github.com/InQuest/malware-samples/tree/master/CVE-2018-4878-Adobe-Flash-DRM-UAF-0day
- [other] 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
- [other] https://github.com/vysec/CVE-2018-4878
- [other] https://securingtomorrow.mcafee.com/mcafee-labs/hackers-bypassed-adobe-flash-protection-mechanism/
- [exploit] https://www.exploit-db.com/exploits/44412/
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-4878
- [other] https://github.com/cisagov/vulnrichment/issues/196

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.