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Fencer Vulns
high 8.8

CVE-2016-7855 kev in the critical feed json

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 att…

published 2016-11-01 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-8704

cvss
8.8
version 3.1, CNA
cisa kev
Exploited
added 2022-03-03
epss
25.2%
EPSS 25.2% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

Summary

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.

Patch / fix

cisa required action The impacted product is end-of-life and should be disconnected if still in use.

  • flashplugin-nonfree Ubuntu 14.04 LTS 11.2.202.643ubuntu0.14.04.1
  • flashplugin-nonfree Ubuntu 16.04 LTS 11.2.202.643ubuntu0.16.04.1

ubuntu advisories UBUNTU-CVE-2016-7855

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • flash-plugin RHEL 5 EXTRAS 11.2.202.643-1.el5_11
  • flash-plugin RHEL 6 EXTRAS 11.2.202.643-1.el6_8

red hat advisories RHSA-2016:2119

  • flash-player SLED 12 SP1, SLE Workstation Extension 12 SP1 11.2.202.643-146.1

suse advisories SUSE-SU-2016:2662-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-7855 updated cvss 8.8

flash-plugin: use-after-free issue fixed in APSB16-36

  • Red Hat Enterprise Linux Desktop Supplementary (v. 5) flash-plugin 11.2.202.643-1.el5_11 Red Hat Enterprise Linux Desktop Supplementary (v. 6) flash-plugin 11.2.202.643-1.el6_8 Red Hat Enterprise Linux Server Supplementary (v. 5) flash-plugin 11.2.202.643-1.el5_11 Red Hat Enterprise Linux Server Supplementary (v. 6) flash-plugin 11.2.202.643-1.el6_8 Red Hat Enterprise Linux Workstation Supplementary (v. 6) flash-plugin 11.2.202.643-1.el6_8
    fixed: vendor fix RHSA-2016:2119

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. Found exploited as a 0-day (Project Zero)
  2. 0-day patched (Project Zero)
  3. Published
  4. Added to CISA KEV
  5. CISA patch deadline
  6. CISA SSVC: exploitation active

Known exploited

Added
4 y ago
Patch by
2022-03-24 (4 y ago)
Ransomware
Not known
Required action
The impacted product is end-of-life and should be disconnected if still in use.
Vendor, product
Adobe, Flash Player
CISA name
Adobe Flash Player Use-After-Free Vulnerability

Zero-day

Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.

Found
2016-10-21
Patched
2016-10-26
Details
project zero tracker

ATT&CK techniques

How it is exploited and what it leads to, in MITRE ATT&CK terms.

  • T1189 Drive-by Compromise exploitation

kev release 2025-07-28, att&ck v16.1. KEV to ATT&CK mappings by the MITRE Center for Threat-Informed Defense (Mappings Explorer, Apache-2.0). © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. Terms of use

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
no
Technical impact
total
Assessed
21 mo ago

Exploit prediction

25.20% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.