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Critical Adobe Flash Player 21.0.0.226 and earlier Vulnerability Tracked as CVE-2016-4117

Critical Adobe Flash Player 21 0 0 226 and earlier Vulnerability Tracked as CVE-2016-4117. CVE-2016-4117 currently carries a CRITICAL 9 8 severity signal in the retained vulnerability data.

NIST NVDSep 10, 2026, 4:17 AM UTC3 min readCVE-2016-4117
IN 30 SECONDS

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What happenedSource reporting

Critical Adobe Flash Player 21 0 0 226 and earlier Vulnerability Tracked as CVE-2016-4117.

Who or what is affectedSource reporting

Attackers are already using this issue in real-world attacks, so exposed systems may need both remediation and investigation for earlier compromise.

Why it mattersSource reporting

Adobe Flash Player 21 0 0 226 and earlier allows remote attackers to execute arbitrary code via unspecified vectors, as exploited in the wild in May 2016.

Defender next stepCDF guidance

Inventory the affected product deployments and confirm whether the affected component and vulnerable release are present.

THE NEWS

The full story

Source-grounded reporting, presented as a continuous narrative.

Critical Adobe Flash Player 21 0 0 226 and earlier Vulnerability Tracked as CVE-2016-4117. CVE-2016-4117 currently carries a CRITICAL 9 8 severity signal in the retained vulnerability data. Adobe Flash Player 21 0 0 226 and earlier allows remote attackers to execute arbitrary code via unspecified vectors, as exploited in the wild in May 2016.

Attackers are already using this issue in real-world attacks, so exposed systems may need both remediation and investigation for earlier compromise.

SOURCE EVIDENCE

What the reporting is based on

NIST NVD

CVE-2016-4117: Adobe Flash Player 21.0.0.226 and earlier allows remote attackers to execute arbitrary code via unspecified vectors, as exploited in the wild in May 2

Adobe Flash Player 21 0 0 226 and earlier allows remote attackers to execute arbitrary code via unspecified vectors, as exploited in the wild in May 2016.

Open source
CYBERDELTAFORCE INTELLIGENCE

Reporting ends here. The sections below are CyberDeltaForce analysis and defender-focused interpretation.

CDF ANALYSIS

What this means

Risk depends on whether the affected technology and the affected component are deployed and reachable, because the reported flaw can lead to remote code execution. Exposure, privilege, business criticality and compensating controls should determine remediation priority.

DEFENDER ACTIONS

What security teams should check now

  • Inventory the affected product deployments and confirm whether the affected component and vulnerable release are present.
  • Apply the vendor patch or mitigation for CVE-2016-4117 and validate the affected path after remediation.
OPEN QUESTIONS

What is not yet confirmed

  • Available reporting does not currently indicate exploitation, but that can change as vendor, government or threat-intelligence reporting develops.
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