How severe is CVE-2016-4138?

CVE-2016-4138 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-4138 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 25% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-4138?

CVE-2016-4138 primarily affects Adobe Flash Player. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-4138?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2016-4138 published?

CVE-2016-4138 was published on 2016-06-16 and last updated on 2026-06-17.

CVE-2016-4138

CVE-2016-4138 is a critical-severity vulnerability in Adobe Flash Player with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 25% places it in the 98th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 25% (98th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Adobe Flash Player
Published: 2016-06-16
Last modified: 2026-06-17

Description

Unspecified vulnerability in Adobe Flash Player 21.0.0.242 and earlier, as used in the Adobe Flash libraries in Microsoft Internet Explorer 10 and 11 and Microsoft Edge, has unknown impact and attack vectors, a different vulnerability than other CVEs listed in MS16-083.

Frequently asked questions

What is CVE-2016-4138?: Unspecified vulnerability in Adobe Flash Player 21.0.0.242 and earlier, as used in the Adobe Flash libraries in Microsoft Internet Explorer 10 and 11 and Microsoft Edge, has unknown impact and attack vectors, a different vulnerability than other CVEs listed in MS16-083.
How severe is CVE-2016-4138?: CVE-2016-4138 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-4138 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 25% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-4138?: CVE-2016-4138 primarily affects Adobe Flash Player. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-4138?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2016-4138 published?: CVE-2016-4138 was published on 2016-06-16 and last updated on 2026-06-17.

References

Affected products (19)

cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_workstation:5.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:*:*:*:*:*:chrome:*:*
cpe:2.3:a:adobe:flash_player_desktop_runtime:*:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:*:*:*:*:*:edge:*:*
cpe:2.3:a:adobe:flash_player:*:*:*:*:*:internet_explorer_11:*:*
cpe:2.3:a:adobe:flash_player:*:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:*:*:*:*:esr:*:*:*
cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
cpe:2.3:o:suse:linux_enterprise_desktop:12:-:*:*:*:*:*:*
cpe:2.3:o:suse:linux_enterprise_desktop:12:sp1:*:*:*:*:*:*
cpe:2.3:o:suse:linux_enterprise_workstation_extension:12:-:*:*:*:*:*:*
cpe:2.3:o:suse:linux_enterprise_workstation_extension:12:sp1:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:-:*:*:*:*:*:*:*

More vulnerabilities in Adobe Flash Player

CVE-2015-8459 — Critical (CVSS 10.0): Adobe Flash Player before 18.0.0.324 and 19.x and 20.x before 20.0.0.267 on Windows and OS X and before 11.2.202.559 on…
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CVE-2015-8455 — Critical (CVSS 10.0): Adobe Flash Player before 18.0.0.268 and 19.x and 20.x before 20.0.0.228 on Windows and OS X and before 11.2.202.554 on…
CVE-2015-8454 — Critical (CVSS 10.0): Use-after-free vulnerability in Adobe Flash Player before 18.0.0.268 and 19.x and 20.x before 20.0.0.228 on Windows and…
CVE-2015-8452 — Critical (CVSS 10.0): Use-after-free vulnerability in Adobe Flash Player before 18.0.0.268 and 19.x and 20.x before 20.0.0.228 on Windows and…
CVE-2015-8451 — Critical (CVSS 10.0): Adobe Flash Player before 18.0.0.268 and 19.x and 20.x before 20.0.0.228 on Windows and OS X and before 11.2.202.554 on…

All CVEs affecting Adobe Flash Player →