End of lifeAdobe Flash Player reached End of lifeThe vendor no longer ships security fixes. Remove or isolate the product instead of waiting for a patch. on 31 Dec 2020. No patch is coming: remove or isolate it.
SummaryAI-written · claude-haiku-5-5AI-written · claude-haiku-5-5Written by a language model from the source data on this page. Not reviewed by a person. Generated 23 Oct 2026.
Adobe Flash Player has a use-after-free flaw in the ByteArray class of its ActionScript 3 implementation, affecting the 13.x through 13.0.0.296, 14.x through 18.0.0.194 and 11.x through 11.2.202.468 releases on Windows, OS X and Linux. A remote, unauthenticated attacker can exploit it without user interaction by supplying crafted Flash content that overrides a valueOf function, enabling arbitrary code execution or a denial of service through memory corruption.
Official description · NVDSource dataSource dataCopied from an authoritative feed: NVD, CVE.org, CISA KEV, FIRST EPSS or MITRE CTID mappings, or labelled by the annotators of a published dataset. Copied from NVD.
Use-after-free vulnerability in the ByteArray class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through 13.0.0.296 and 14.x through 18.0.0.194 on Windows and OS X and 11.x through 11.2.202.468 on Linux allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted Flash content that overrides a valueOf function, as exploited in the wild in July 2015.
Priority scorePatchfirst’s 0 to 100 ranking. It adds points for CISA KEV listing, ransomware use, EPSS, threat reports, public exploit code and CVSS. Every CVE page shows the breakdown.Breakdown
74.8 / 100
Exploited
Yes, in CISA KEV
Reports
5
Tactics
5/15
How an attack unfolds
Based on MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. mappings. Select a step to see the evidence.
Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
First seen exploited 3 days before it was disclosed. Public exploit code (Metasploit) was available 2 days before disclosure.
CISA KEV listing is when exploitation was confirmed, not necessarily the first attack.
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
5 TechniqueOne specific attacker behaviour in MITRE ATT&CK, such as T1190 “Exploit Public-Facing Application”. IDs with a dot, like T1059.004, are sub-techniques., grouped by TacticThe attacker’s goal at a stage of an attack in MITRE ATT&CK, such as Initial Access or Persistence. Each technique belongs to one or more tactics. in kill-chain orderSourceSource dataCopied from an authoritative feed: NVD, CVE.org, CISA KEV, FIRST EPSS or MITRE CTID mappings, or labelled by the annotators of a published dataset.5
Source dataSource dataCopied from an authoritative feed: NVD, CVE.org, CISA KEV, FIRST EPSS or MITRE CTID mappings, or labelled by the annotators of a published dataset. CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Use After Free.MITRE CTID mapping of the KEV entry · how it is exploited
To exploit this vulnerability, adversaries sent spearphishing emails with URLs to webpages with maliciously crafted javascript. The adversaries then download a payload.
Source dataSource dataCopied from an authoritative feed: NVD, CVE.org, CISA KEV, FIRST EPSS or MITRE CTID mappings, or labelled by the annotators of a published dataset. CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Use After Free.MITRE CTID mapping of the KEV entry · how it is exploited
Source dataSource dataCopied from an authoritative feed: NVD, CVE.org, CISA KEV, FIRST EPSS or MITRE CTID mappings, or labelled by the annotators of a published dataset. CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Use After Free.MITRE CTID mapping of the KEV entry · follow-on activity
This vulnerability has been exploited in the wild by multiple different threat actors. Threat groups send phishing emails with URLs where maliciously-crafted javascript is hosted. This CVE has many mappable exploitation techniques and impacts.
These adversaries using this exploit to deliver malicious payloads to the target machines establish DLL backdoors.
Source dataSource dataCopied from an authoritative feed: NVD, CVE.org, CISA KEV, FIRST EPSS or MITRE CTID mappings, or labelled by the annotators of a published dataset. CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Use After Free.MITRE CTID mapping of the KEV entry · follow-on activity
Source dataSource dataCopied from an authoritative feed: NVD, CVE.org, CISA KEV, FIRST EPSS or MITRE CTID mappings, or labelled by the annotators of a published dataset. CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Use After Free.MITRE CTID mapping of the KEV entry · primary impact
Lower-confidence links (2)
These come from early or generic mappings, text matching, or contradict this CVE’s details (for example a public-facing technique on a bug that needs a user to open a file). Shown for completeness.
Exploitation for Client ExecutionT1203SourceSource dataCopied from an authoritative feed: NVD, CVE.org, CISA KEV, FIRST EPSS or MITRE CTID mappings, or labelled by the annotators of a published dataset. CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Use After Free.server-side bug exploitable without user interaction; client-execution technique does not fit
Malicious LinkT1204.001SourceSource dataCopied from an authoritative feed: NVD, CVE.org, CISA KEV, FIRST EPSS or MITRE CTID mappings, or labelled by the annotators of a published dataset. CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Use After Free.server-side bug exploitable without user interaction; client-execution technique does not fit
Detection
0 rules for this CVE · 170 general rules for its techniques
Rules for this CVE
0Sigma ruleAn open, vendor-neutral detection rule for log data. Security teams convert Sigma rules into searches for their own SIEM. that reference CVE-2015-5119 directly.
CVE-specific rules are not available in this build. Search SigmaHQ ↗
General rules for this CVE’s techniques
These detect the technique in general, not this specific vulnerability.
Named in 5 threat reportsMachineMachine-matchedFound by keyword or pattern matching over threat-report text. Not reviewed by a person. Exact CVE id found in the report text.
Reports are matched by finding the exact id CVE-2015-5119 in their text; nobody has reviewed the match. One passage is shown per report, at most 320 characters, linked to the original.
PLEAD also dabbled with a short-lived, fileless version of their malware when it obtained an exploit for a Flash vulnerability (CVE-2015-5119) that was leaked during the Hacking Team breach.
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