Security readout for executives and security teams
This flaw let an attacker run code through vulnerable Adobe Flash Player versions before 28.0.0.161 when a user interacted with malicious content. It was exploited in the wild in early 2018, so any remaining Flash dependency should be treated as high-risk legacy exposure. Exposure is most likely on endpoints, browsers, or bundled applications retaining Adobe Flash Player versions before 28.0.0.161. Organizations with legacy media workflows, old browser images, or archived virtual desktops should verify directly rather than assuming Flash is absent. Treat this as a legacy-technology cleanup priority with high urgency where Flash remains installed. Known exploitation and arbitrary code execution make unmanaged remnants materially risky, even though the provided sources only document exploitation in 2018. Mitigation focus: Update Adobe Flash Player to 28.0.0.161 or later where still present.; Remove unsupported or unnecessary Flash installations from endpoints and images.; Check Adobe and operating-system vendor advisories for environment-specific guidance..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-416: Exact CWE lookup
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Open ATT&CK lookupExecution behavior lookup
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Open ATT&CK lookupCVE-2018-4878 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
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CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://threatpost.com/adobe-flash-player-zero-day-spotted-in-the-wild/129742/CVE reference · x_refsource_MISC
- https://helpx.adobe.com/security/products/flash-player/apsb18-03.htmlCVE reference · x_refsource_MISC
- RHSA-2018:0285CVE reference · vendor-advisory, x_refsource_REDHAT
- https://www.fireeye.com/blog/threat-research/2018/02/attacks-leveraging-adobe-zero-day.htmlCVE reference · x_refsource_MISC
- https://blog.morphisec.com/flash-exploit-cve-2018-4878-spotted-in-the-wild-massive-malspam-campaignCVE reference · x_refsource_MISC
- https://www.darkreading.com/threat-intelligence/adobe-flash-vulnerability-reappears-in-malicious-word-files/d/d-id/1331139CVE reference · x_refsource_MISC
- https://github.com/InQuest/malware-samples/tree/master/CVE-2018-4878-Adobe-Flash-DRM-UAF-0dayCVE reference · x_refsource_MISC
- 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-targetsCVE reference · x_refsource_MISC
- https://github.com/vysec/CVE-2018-4878CVE reference · x_refsource_MISC
- https://securingtomorrow.mcafee.com/mcafee-labs/hackers-bypassed-adobe-flash-protection-mechanism/CVE reference · x_refsource_MISC
- 44412CVE reference · exploit, x_refsource_EXPLOIT-DB
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-4878CVE reference · government-resource
- https://github.com/cisagov/vulnrichment/issues/196CVE reference · issue-tracking
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.