How severe is CVE-2016-4271?

CVE-2016-4271 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2016-4271 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-4271?

CVE-2016-4271 primarily affects Adobe Flash Player. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-4271?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2016-4271 published?

CVE-2016-4271 was published on 2016-09-14 and last updated on 2026-06-17.

CVE-2016-4271

CVE-2016-4271 is a medium-severity vulnerability in Adobe Flash Player with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 5% (90th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Adobe Flash Player
Published: 2016-09-14
Last modified: 2026-06-17

Description

Adobe Flash Player before 18.0.0.375 and 19.x through 23.x before 23.0.0.162 on Windows and OS X and before 11.2.202.635 on Linux allows attackers to bypass intended access restrictions and obtain sensitive information via unspecified vectors, a different vulnerability than CVE-2016-4277 and CVE-2016-4278, aka a "local-with-filesystem Flash sandbox bypass" issue.

Frequently asked questions

What is CVE-2016-4271?: Adobe Flash Player before 18.0.0.375 and 19.x through 23.x before 23.0.0.162 on Windows and OS X and before 11.2.202.635 on Linux allows attackers to bypass intended access restrictions and obtain sensitive information via unspecified vectors, a different vulnerability than CVE-2016-4277 and CVE-2016-4278, aka a "local-with-filesystem Flash sandbox bypass" issue.
How severe is CVE-2016-4271?: CVE-2016-4271 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2016-4271 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-4271?: CVE-2016-4271 primarily affects Adobe Flash Player. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-4271?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-4271 published?: CVE-2016-4271 was published on 2016-09-14 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:a:adobe:flash_player:*:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:*:*:*:*:*:edge:*:*
cpe:2.3:a:adobe:flash_player:*:*:*:*:*:internet_explorer:*:*
cpe:2.3:a:adobe:flash_player_desktop_runtime:*:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:*:*:*:*:esr:*:*:*
cpe:2.3:a:adobe:flash_player:*:*:*:*:*:chrome:*:*

More vulnerabilities in Adobe Flash Player

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