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CVE-2018-4945: Adobe Flash Player versions 29.0.0.171 and earlier have a Type Confusion vulnerability

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HIGH 8.8WATCHLISTUPGRADEUPGRADEUPGRADE

CVE-2018-4945 is a high-severity flaw (CVSS 8.8) affecting flash player desktop runtime, flash player, flash player. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Adobe Flash Player versions 29.0.0.171 and earlier have a Type Confusion vulnerability. Successful exploitation could lead to arbitrary code execution in the context of the current user.

Why this priority

  • High severity
  • EPSS top 6%: very likely to be exploited
  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score8.8 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionRequired
EPSS exploit chance6.7% (top 6%)
CISA exploited listNo
WeaknessCWE-704
Published2018-07-09
Last modified2026-06-17
Publisher (CNA): Adobe Systems Incorporated · Vendor: adobe · redhat

Share: LinkedIn · X · Reddit

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

adobe flash player desktop runtime UPGRADE
Affected: <= 29.0.0.171
Fixed in: newer than 29.0.0.171
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy flash-player-desktop-runtime || rpm -q flash-player-desktop-runtime || flash-player-desktop-runtime --version
2. UPGRADE to newer than 29.0.0.171 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade flash-player-desktop-runtime
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade flash-player-desktop-runtime
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
adobe flash player UPGRADE
Affected: <= 29.0.0.171
Fixed in: newer than 29.0.0.171
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy flash-player || rpm -q flash-player || flash-player --version
2. UPGRADE to newer than 29.0.0.171 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade flash-player
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade flash-player
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
adobe flash player UPGRADE
Affected: <= 29.0.0.171
Fixed in: newer than 29.0.0.171
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy flash-player || rpm -q flash-player || flash-player --version
2. UPGRADE to newer than 29.0.0.171 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade flash-player
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade flash-player
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
adobe flash player UPGRADE
Affected: <= 29.0.0.171
Fixed in: newer than 29.0.0.171
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy flash-player || rpm -q flash-player || flash-player --version
2. UPGRADE to newer than 29.0.0.171 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade flash-player
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade flash-player
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
redhat enterprise linux desktop MITIGATE
Affected: 6.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 6.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
redhat enterprise linux server MITIGATE
Affected: 6.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 6.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-4945?

flash player desktop runtime: upgrade to newer than 29.0.0.171; flash player: upgrade to newer than 29.0.0.171; flash player: upgrade to newer than 29.0.0.171. Exact commands for each OS are on this page.

Is CVE-2018-4945 being exploited?

CVE-2018-4945 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-4945 affect?

CVE-2018-4945 affects flash player desktop runtime, flash player, flash player. Severity is high (CVSS 8.8). Adobe Flash Player versions 29.0.0.171 and earlier have a Type Confusion vulnerability. Successful exploitation could lead to arbitrary code execution in the context of the current user.

How urgent is CVE-2018-4945?

Priority 59/100. High severity; EPSS top 6%: very likely to be exploited; On your watchlist

Software pages

Adobe Flash vulnerabilities

Related CVEs

References

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