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CISA KEV · ACTIVELY EXPLOITED
HIGH severity

CVE-2016-1019 — Red Hat

HIGH

CVE-2016-1019 is a high-severity (CVSS 7.8) remote code execution vulnerability. It is in CISA's Known Exploited Vulnerabilities catalog (added 2022-03-03) and has been used in ransomware campaigns — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed below.

Adobe Flash Player 21.0.0.197 and earlier allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via unspecified vectors, as exploited…

Published
Updated
Affected
5 products
Patched
See advisory
Exploits
3 known
Exploitation data as of Oct 22, 2026 · OSV.dev, NVD, CISA KEV, FIRST.org (EPSS)

Exploitation Status

Actively exploited in the wild

  • Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2022-03-03 — including use in ransomware campaigns. Federal agencies were required to remediate by 2022-03-24.
  • A successful exploit gives an attacker total control of the affected component, not partial access.

Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2016-1019.

EPSS Exploitation Probability

via FIRST.org ↗
22.3%probability of exploitation in next 30 days
Moderate Risk0.00%
Lower risk than most CVEs98th percentile — riskier than 98% of all scored CVEsHighest risk
7.58%33.8%60.0%86.2%71.4%22.3%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2016-1019 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 395,249 CVEs with a current EPSS score, this one falls in the 10–50% band (highlighted). Counts from FIRST.org, log-scaled.

Description

Adobe Flash Player 21.0.0.197 and earlier allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via unspecified vectors, as exploited in the wild in April 2016.

Affected Products

5 products · 9 configurations
Application
air desktop runtimeadobe
≤ 21.0.0.176
range
Application
air sdkadobe
≤ 21.0.0.176
range
Application
air sdk \& compileradobe
≤ 21.0.0.176
range
Application
flash playeradobe
≤ 11.2.202.577
range
Application
flash player desktop runtimeadobe
≤ 21.0.0.197
range
Exploits & PoCs
3

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Detection & mitigation playbook

Vulnerability
  1. Detect

    Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

  2. Remediation status

    No fixed release is recorded for CVE-2016-1019 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.

  3. Mitigate without a patch

    Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatCritical
ProductFixed inAdvisory
Red Hat Enterprise Linux 5 Supplementaryflash-plugin-0:11.2.202.616-1.el5RHSA-2016:0610

Frequently Asked Questions

Adobe Flash Player 21.0.0.197 and earlier allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via unspecified vectors, as exploited in the wild in April 2016.
O3 Security · Impact-Aware SCA

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Actively Exploited: CVE-2016-1019: Red Hat RCE (High 7.8)