CVE-2017-3084: Adobe Flash Player versions 25.0.0.171 and earlier have an exploitable use after free vulnerability in the adv

Q: How do I fix CVE-2017-3084?

flash player: upgrade to newer than 25.0.0.171. Exact commands for each OS are on this page.

Q: Is CVE-2017-3084 being exploited?

CVE-2017-3084 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2017-3084 affect?

CVE-2017-3084 affects flash player. Severity is critical (CVSS 9.8). Adobe Flash Player versions 25.0.0.171 and earlier have an exploitable use after free vulnerability in the advertising metadata functionality. Successful exploitation could lead to arbitrary code execution.

Q: How urgent is CVE-2017-3084?

Priority 63/100. Critical severity; EPSS top 5%: very likely to be exploited; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2017-3084 is a critical-severity flaw (CVSS 9.8) affecting flash player. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Adobe Flash Player versions 25.0.0.171 and earlier have an exploitable use after free vulnerability in the advertising metadata functionality. Successful exploitation could lead to arbitrary code execution.

Why this priority

Critical severity
EPSS top 5%: very likely to be exploited
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	8.7% (top 5%)
CISA exploited list	No
Weakness	CWE-416
Published	2017-06-20
Last modified	2026-06-17

Publisher (CNA): Adobe Systems Incorporated · Vendor: adobe

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

Am I affected?

Timeline

2017-06-20 17:29 UTCPublished CVE record published
2026-06-17 01:17 UTCUpdated Record last modified

adobe flash player UPGRADE

Affected: <= 25.0.0.171

Fixed in: newer than 25.0.0.171

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 25.0.0.171 (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.

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-2017-3084?

flash player: upgrade to newer than 25.0.0.171. Exact commands for each OS are on this page.

Is CVE-2017-3084 being exploited?

CVE-2017-3084 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-2017-3084 affect?

CVE-2017-3084 affects flash player. Severity is critical (CVSS 9.8). Adobe Flash Player versions 25.0.0.171 and earlier have an exploitable use after free vulnerability in the advertising metadata functionality. Successful exploitation could lead to arbitrary code execution.

How urgent is CVE-2017-3084?

Priority 63/100. Critical severity; EPSS top 5%: very likely to be exploited; Remotely exploitable, no login, no user action

Software pages

Adobe Flash vulnerabilities

Related CVEs

CVE-2018-15982 HIGH 7.8 EXPLOITED UPGRADE UPGRADE Adobe Flash Player Use-After-Free Vulnerability
CVE-2020-9746 HIGH 7.0 UPGRADE UPGRADE Adobe Flash Player version 32.0.0.433 (and earlier) are affected by an exploitable NULL pointer dereference vu
CVE-2020-9633 CRITICAL 9.8 UPGRADE UPGRADE Adobe Flash Player Desktop Runtime 32.0.0.371 and earlier, Adobe Flash Player for Google Chrome 32.0.0.371 and
CVE-2020-3757 HIGH 8.8 UPGRADE UPGRADE Adobe Flash Player versions 32.0.0.321 and earlier, 32.0.0.314 and earlier, 32.0.0.321 and earlier, and 32.0.0
CVE-2019-8075 HIGH 7.5 UPGRADE UPGRADE Adobe Flash Player version 32.0.0.192 and earlier versions have a Same Origin Policy Bypass vulnerability

References

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