NVD / CVE Program· CNA adobe

CVE-2016-7855: Use-after-free vulnerability in Adobe Flash Player before 23.0.0.205 on Windows and OS X and before 11.2.202.643 on Linux allows remote…

HighCVSS 8.8 · v3.1KEVWeaponized Fix available

Noroxi assessment

Priority: This week (action score 73/100)

CISA has confirmed exploitation in the wild (Mar 3, 2022). Remediation deadline for US federal agencies: Mar 24, 2022.
Probability of exploitation in the next 30 days: 25.1% (FIRST EPSS); higher than 97.9% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
Fixed version: flash-plugin (Red Hat:rhel_extras:5::client) 0:11.2.202.643-1.el5_11; flash-plugin (Red Hat:rhel_extras:6) 0:11.2.202.643-1.el6_8; flash-player (SUSE:Linux Enterprise Desktop 12 SP1) 11.2.202.643-146.1.

Don’t wait for the next maintenance window. Upgrade to flash-plugin (Red Hat:rhel_extras:5::client) 0:11.2.202.643-1.el5_11; flash-plugin (Red Hat:rhel_extras:6) 0:11.2.202.643-1.el6_8; flash-player (SUSE:Linux Enterprise Desktop 12 SP1) 11.2.202.643-146.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

Use-after-free vulnerability in Adobe Flash Player before 23.0.0.205 on Windows and OS X and before 11.2.202.643 on Linux allows remote attackers to execute arbitrary code via unspecified vectors, as exploited in the wild in October 2016.

Published: Nov 1, 2016
Updated: Jun 16, 2026
EPSS: 25.1% · 97th percentile
CWE: CWE-416

Report tools

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Action score

This week

Don’t wait for the next maintenance window.

CVSS: 35 / 40 · 8.8 / 10
CISA KEV: 30 / 30 · Listed
EPSS: 8 / 30 · 25.1%

CISA SSVC decision

Exploitation: active
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Mar 3, 2022. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Mar 24, 2022.

Get told when this record changes

In CISA KEV: exploitation in the wild confirmed
Weaponized exploit exists
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
adobe	flash player	cpe:2.3:a:adobe:flash_player
apple	mac os x	cpe:2.3:o:apple:mac_os_x
google	chrome os	cpe:2.3:o:google:chrome_os
linux	linux kernel	cpe:2.3:o:linux:linux_kernel
microsoft	windows	cpe:2.3:o:microsoft:windows
microsoft	windows 10	cpe:2.3:o:microsoft:windows_10
microsoft	windows 8.1	cpe:2.3:o:microsoft:windows_8.1
microsoft	windows rt 8.1	cpe:2.3:o:microsoft:windows_rt_8.1
microsoft	windows server 2012	cpe:2.3:o:microsoft:windows_server_2012
redhat	enterprise linux desktop	cpe:2.3:o:redhat:enterprise_linux_desktop
redhat	enterprise linux server	cpe:2.3:o:redhat:enterprise_linux_server
redhat	enterprise linux workstation	cpe:2.3:o:redhat:enterprise_linux_workstation

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

adobe flash playerup to 23.0.0.185 inclusive
adobe flash playerup to 11.2.202.637 inclusive
redhat enterprise linux desktop5.0
redhat enterprise linux desktop6.0
redhat enterprise linux server5.0
redhat enterprise linux server6.0
redhat enterprise linux workstation5.0
redhat enterprise linux workstation6.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Red Hat:rhel_extras:5::client	flash-plugin	before 0:11.2.202.643-1.el5_11	0:11.2.202.643-1.el5_11
Red Hat:rhel_extras:6	flash-plugin	before 0:11.2.202.643-1.el6_8	0:11.2.202.643-1.el6_8
SUSE:Linux Enterprise Desktop 12 SP1	flash-player	before 11.2.202.643-146.1	11.2.202.643-146.1

Same product

adobe: all records

Other highest-scoring records for the same primary product.

CVE-2015-5119Use-after-free vulnerability in the ByteArray class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through…KEV
99Now
CVE-2015-3113Heap-based buffer overflow in Adobe Flash Player before 13.0.0.296 and 14.x through 18.x before 18.0.0.194 on Windows and OS X and before…KEV
99Now
CVE-2014-0497Integer underflow in Adobe Flash Player before 11.7.700.261 and 11.8.x through 12.0.x before 12.0.0.44 on Windows and Mac OS X, and before…KEV
99Now

Published before and after this one in the same product

← EarlierCVE-2016-6990Oct 13, 2016 · Adobe Flash Player before 18.0.0.382 and 19.x through 23.x before 23.0.0.185 on Windows and OS X and before 11.2.202.637 on Linux allows…
36Monitor
← EarlierCVE-2016-6992Oct 13, 2016 · Adobe Flash Player before 18.0.0.382 and 19.x through 23.x before 23.0.0.185 on Windows and OS X and before 11.2.202.637 on Linux allows…
37Monitor
Later →CVE-2016-7860Nov 8, 2016 · Adobe Flash Player versions 23.0.0.205 and earlier, 11.2.202.643 and earlier have an exploitable type confusion vulnerability.
37Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
red hat:flash-plugin	0:11.2.202.643-1.el5_11 · Red Hat:rhel_extras:5::client	Package registry (OSV)
suse:flash-player	11.2.202.643-146.1 · SUSE:Linux Enterprise Desktop 12 SP1	Package registry (OSV)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Proof-of-concept repository on GitHub	stars:0	2016-10-26

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

First PoCOct 26, 2016-7 d
PublishedNov 1, 2016
CISA KEVMar 3, 2022+1947 d
TodayNov 15, 2026+3666 d

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
A user must open a link or visit a page.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: Required
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

nvd-primary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log (1)

Fix✗ → ✓Sep 28, 2026, 10:46 PM UTC

For records you follow, these changes also arrive as notifications. →

References

rhn.redhat.com/errata/RHSA-2016-2119.html

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records

Noroxi analysis

What does it mean in your environment?

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Data sources and verification

CNA: adobe

CVE.org (CNA)Oct 21, 2025, 11:55 PM UTC
CISA ADPOct 21, 2025, 11:55 PM UTC
NVDJun 16, 2026, 8:53 PM UTC
FIRST EPSSNov 14, 2026, 12:00 AM UTC
OSV / GHSANov 15, 2026, 3:15 AM UTC
PoC-in-GitHubNov 15, 2026, 3:15 AM UTC

Each line is when that source was last processed for this record.