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Fencer Vulns
high 8.8

CVE-2018-4920 json

Adobe Flash Player versions 28.0.0.161 and earlier have an exploitable type confusion vulnerability.

published 2018-05-19 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-16705

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
7.6%
EPSS 7.6% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

Adobe Flash Player versions 28.0.0.161 and earlier have an exploitable type confusion vulnerability. Successful exploitation could lead to arbitrary code execution in the context of the current user.

Patch / fix

  • flashplugin-nonfree Ubuntu 14.04 LTS 29.0.0.140ubuntu0.14.04.1
  • flashplugin-nonfree Ubuntu 16.04 LTS 29.0.0.140ubuntu0.16.04.1

ubuntu advisories UBUNTU-CVE-2018-4920

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • flash-plugin RHEL 6 EXTRAS 29.0.0.113-1.el6_9

red hat advisories RHSA-2018:0520

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-4920 updated cvss 8.8

flash-plugin: Type Confusion - remote code execution vulnerability (APSB18-05)

  • Red Hat Enterprise Linux Desktop Supplementary (v. 6) flash-plugin 29.0.0.113-1.el6_9 Red Hat Enterprise Linux Server Supplementary (v. 6) flash-plugin 29.0.0.113-1.el6_9 Red Hat Enterprise Linux Workstation Supplementary (v. 6) flash-plugin 29.0.0.113-1.el6_9
    fixed: vendor fix RHSA-2018:0520

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

7.57% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected products

  • n/a Adobe Flash Player 28.0.0.161 and earlier versions

Classification

Weakness
  • CWE-843 Access of Resource Using Incompatible Type

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.