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Vulnerability Assessment

Weakness
CWE
CWE-416
ASVS 5.0
V15 - Secure Coding and Architecture Memory lifecycle management
MITRE ATT&CK

2 techniques across 2 tactics: Execution, Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

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Impact

CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. CISA has confirmed active exploitation in the wild. Public proof-of-concept exploit code is available. EPSS exploitation probability: 92.78%.
Exploit ScenarioDerived

A remote attacker could access freed memory to execute arbitrary code or crash the application by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.
Emergency Immediate action required. Why: CRITICAL + in CISA KEV (actively exploited), no patch available.
Exploited in the wild (CISA KEV) No patch listed yet 92.8% exploitation probability (EPSS)

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AnalysisAI

Use-after-free vulnerability in the DisplayObject class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through 13.0.0.302 on Windows and OS X, 14.x through 18.0.0.203 on. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Actively exploited in the wild (cisa kev) and public exploit code available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Use smart pointers or garbage-collected languages. Set pointers to NULL after freeing. Enable memory sanitizers.

Affects your stack

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Technical ContextAI · show details

This vulnerability is classified as Use After Free (CWE-416), which allows attackers to access freed memory to execute arbitrary code or crash the application. Use-after-free vulnerability in the DisplayObject class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through 13.0.0.302 on Windows and OS X, 14.x through 18.0.0.203 on Windows and OS X, 11.x through 11.2.202.481 on Linux, and 12.x through 18.0.0.204 on Linux Chrome installations allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted Flash content that leverages improper handling of the opaqueBackground property, as exploited in the wild in July 2015. Affected products include: Adobe Flash Player, Adobe Flash Player Desktop Runtime, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Eus. Version information: through 13.0.0.302.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Added to CISA KEV
Apr 21, 2026 - 15:31 CISA
CVE Published
Jul 14, 2015 - 10:59 cve.org
CRITICAL 9.8

DescriptionCVE.org

Use-after-free vulnerability in the DisplayObject class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through 13.0.0.302 on Windows and OS X, 14.x through 18.0.0.203 on Windows and OS X, 11.x through 11.2.202.481 on Linux, and 12.x through 18.0.0.204 on Linux Chrome installations allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted Flash content that leverages improper handling of the opaqueBackground property, as exploited in the wild in July 2015.

Threat Intelligence Overview

Threat Score
7.7/10
Composite threat intelligence
EPSS Score
92.8%
Top 0% exploitable
Exploit
POC
Public exploit code exists
Data Quality
8 sources
Confidence: High
NVD CVE.org CISA KEV EPSS POC (1) Exploit-DB GitHub VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV Yes
Public POC Yes
EPSS 92.8%
Patch available No
Active threat Yes
Deciding rule
CRITICAL + in CISA KEV (actively exploited), no patch available
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Immediate
Exploitation· derived
Active
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
High

Priority Score

227
Low Medium High Critical
KEV: +50
EPSS: +93
CVSS: +49
PoC: +20
Weaponized: +15
Threat intel: 0
Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Use After Free HIGH

Use-after-free vulnerabilities occur when a program continues to access memory through a pointer after that memory has been deallocated.

Memory Corruption HIGH

Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)CVE.org

cpe:2.3:a:adobe:flash_player:*:*:*:*:esr:*:*:*
cpe:2.3:a:adobe:flash_player:*:*:*:*:*:chrome:*:*
cpe:2.3:a:adobe:flash_player_desktop_runtime:*:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:*:*:*:*:*:chrome:*:*
cpe:2.3:a:adobe:flash_player:*:*:*:*:*:internet_explorer_10:*:*
cpe:2.3:a:adobe:flash_player:*:*:*:*:*:internet_explorer_11:*:*
cpe:2.3:a:adobe:flash_player:*:*:*:*:*:*:*:*
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_server_eus:6.6:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_workstation:5.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:evergreen:11.4:*:*:*:*:*:*:*
cpe:2.3:o:suse:linux_enterprise_desktop:11:sp3:*:*:*:*:*:*
cpe:2.3:o:suse:linux_enterprise_desktop:11:sp4:*:*:*:*:*:*
cpe:2.3:o:suse:linux_enterprise_desktop:12:*:*:*:*:*:*:*
cpe:2.3:o:suse:linux_enterprise_workstation_extension:12:*:*:*:*:*:*:*

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Remote code execution in Adobe Flash Player 11.x through 18.x allows unauthenticated network attackers to execute arbitr
CVE-2016-4117 CRITICAL POC
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Remote code execution in Adobe Flash Player 21.0.0.226 and earlier allows unauthenticated network attackers to execute a
CVE-2015-3113 CRITICAL POC
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Adobe Flash Player contains a heap-based buffer overflow that allows remote code execution, exploited as a zero-day in J
CVE-2011-0611 HIGH POC
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CVE-2014-0497 CRITICAL POC
9.8 Feb 05

Integer 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 Ma
CVE-2015-0313 CRITICAL POC
9.8 Feb 02

Use-after-free vulnerability in Adobe Flash Player before 13.0.0.269 and 14.x through 16.x before 16.0.0.305 on Windows

CVE-2015-0311 CRITICAL POC
9.8 Jan 23

Unspecified vulnerability in Adobe Flash Player through 13.0.0.262 and 14.x, 15.x, and 16.x through 16.0.0.287 on Window
CVE-2011-0609 HIGH POC
7.8 Mar 15

Adobe Flash Player 10.2 and earlier across all platforms contain an unspecified vulnerability allowing remote code execu
CVE-2015-3043 CRITICAL POC
9.8 Apr 14

Adobe Flash Player before 13.0.0.281 and 14.x through 17.x before 17.0.0.169 on Windows and OS X and before 11.2.202.457
CVE-2012-1535 HIGH POC
7.8 Aug 15

Unspecified vulnerability in Adobe Flash Player before 11.3.300.271 on Windows and Mac OS X and before 11.2.202.238 on L
CVE-2014-0502 HIGH POC
8.8 Feb 21

Double free vulnerability in Adobe Flash Player before 11.7.700.269 and 11.8.x through 12.0.x before 12.0.0.70 on Window
CVE-2015-7645 HIGH POC
7.8 Oct 15

Adobe Flash Player 18.x through 18.0.0.252 and 19.x through 19.0.0.207 on Windows and OS X and 11.x through 11.2.202.535

Same weakness CWE-416 – Use After Free

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CVE-2019-0708 CRITICAL POC
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CVE-2014-0322 HIGH POC
8.8
CVE-2012-4792 HIGH POC
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CVE-2009-4324 HIGH POC
7.8
CVE-2013-2551 HIGH POC
8.8
CVE-2012-4969 HIGH POC
8.1

Same technique RCE

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CVE-2021-44228 CRITICAL POC
10.0
CVE-2017-7269 CRITICAL POC
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CVE-2022-47966 CRITICAL POC
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CVE-2012-4681 CRITICAL POC
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CVE-2023-3519 CRITICAL POC
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References

Advisories & patches
ADVISORY https://helpx.adobe.com/security/products/flash-player/apsa15-04.html ADVISORY https://helpx.adobe.com/security/products/flash-player/apsb15-18.html ADVISORY https://vuldb.com/vuln/76420 REF http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00028.html REF http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00029.html REF http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00032.html REF http://marc.info/?l=bugtraq&m=144050155601375&w=2 REF http://rhn.redhat.com/errata/RHSA-2015-1235.html REF http://www.kb.cert.org/vuls/id/338736 REF http://www.rapid7.com/db/modules/exploit/multi/browser/adobe_flash_opaque_background_uaf REF http://www.securityfocus.com/bid/75712 REF http://www.securitytracker.com/id/1032890 REF http://www.us-cert.gov/ncas/alerts/TA15-195A REF https://github.com/cisagov/vulnrichment/issues/196 REF https://h20564.www2.hp.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04796784 REF https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04952467 REF https://perception-point.io/2018/04/11/breaking-cfi-cve-2015-5122-coop/ REF https://perception-point.io/new/breaking-cfi.php REF https://security.gentoo.org/glsa/201508-01 REF https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-5122 REF https://www.fireeye.com/blog/threat-research/2015/07/cve-2015-5122_-_seco.html

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