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Threats / Adobe / CVE-2015-5119
CVE-2015-5119 · EUVD no mirror located · GCVE no mirror located Verified 2026-06-22

Adobe Flash Player vulnerability

Use-after-free vulnerability in Adobe Flash Player's ActionScript 3 ByteArray class enables remote code execution. Actively exploited in the wild with high EPSS score.

Verdict

Today item — known-exploited.

A use-after-free memory corruption flaw in Flash Player's ByteArray implementation allows attackers to achieve arbitrary code execution on vulnerable systems. The vulnerability is actively exploited and poses significant risk to deployed Flash installations.

CISA KEV Yes · 2022-03-033EPSS 0.99344 (verify live)4Exploit Public PoC5
01

Is it exploitable?

— the evidence, ranked above the score
Exploit available
Public proof-of-concept exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
vulncheck.com ↗vulncheck.com ↗Confirmed
Reported exploitation
27 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
docs.google.com ↗cve.org ↗resources.infosecinstitu ↗trendmicro.com ↗Confirmed
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-03).
CISA KEV ↗Confirmed
Probability (EPSS)
EPSS 0.99344 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
FIRST EPSS ↗High
Severity / affected
Affected: Adobe, Flash Player. Confirm exact fixed builds in the vendor advisory.
NVD ↗Reported
Weakness (CWE)
Mapped to CWE-119 Memory Buffer Bounds Error — weakness family: Memory safety.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
NVD ↗Reported
WeaknessCWE-119 · Memory Buffer Bounds ErrorMemory safety
02

Who’s exploiting it?

— attribution turns risk into urgency
Attribution not established

No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.

Lower-confidence links — not headline attribution

These are not confirmed attribution and do not name this record’s headline actor. Each is tier-labeled and cited; an inferred link is a structural ATT&CK chain (a group uses a tool whose reference cites this CVE), never a statement that the source names the group.

INFERREDAndariel ↗

ATT&CK attributes gh0st RAT (S0032) to Andariel ↗, and that software’s ATT&CK reference cites this CVE. Structural chain, not a direct naming of the group — shown as inferred only. source ↗

INFERREDKimsuky ↗

ATT&CK attributes gh0st RAT (S0032) to Kimsuky ↗, and that software’s ATT&CK reference cites this CVE. Structural chain, not a direct naming of the group — shown as inferred only. source ↗

INFERREDTA459 ↗

ATT&CK attributes gh0st RAT (S0032) to TA459 ↗, and that software’s ATT&CK reference cites this CVE. Structural chain, not a direct naming of the group — shown as inferred only. source ↗

INFERREDAPT5 ↗

ATT&CK attributes gh0st RAT (S0032) to APT5 ↗, and that software’s ATT&CK reference cites this CVE. Structural chain, not a direct naming of the group — shown as inferred only. source ↗

INFERREDAPT41 ↗

ATT&CK attributes gh0st RAT (S0032) to APT41 ↗, and that software’s ATT&CK reference cites this CVE. Structural chain, not a direct naming of the group — shown as inferred only. source ↗

INFERREDAxiom ↗

ATT&CK attributes gh0st RAT (S0032) to Axiom ↗, and that software’s ATT&CK reference cites this CVE. Structural chain, not a direct naming of the group — shown as inferred only. source ↗

INFERREDLeviathan ↗

ATT&CK attributes gh0st RAT (S0032) to Leviathan ↗, and that software’s ATT&CK reference cites this CVE. Structural chain, not a direct naming of the group — shown as inferred only. source ↗

INFERREDThreat Group-3390 ↗

ATT&CK attributes gh0st RAT (S0032) to Threat Group-3390 ↗, and that software’s ATT&CK reference cites this CVE. Structural chain, not a direct naming of the group — shown as inferred only. source ↗

INFERREDPittyTiger ↗

ATT&CK attributes gh0st RAT (S0032) to PittyTiger ↗, and that software’s ATT&CK reference cites this CVE. Structural chain, not a direct naming of the group — shown as inferred only. source ↗

INFERREDHigaisa ↗

ATT&CK attributes gh0st RAT (S0032) to Higaisa ↗, and that software’s ATT&CK reference cites this CVE. Structural chain, not a direct naming of the group — shown as inferred only. source ↗

INFERREDAPT18 ↗

ATT&CK attributes gh0st RAT (S0032) to APT18 ↗, and that software’s ATT&CK reference cites this CVE. Structural chain, not a direct naming of the group — shown as inferred only. source ↗

03

Why it matters

— the attack path, told twice: adversary, then board
1

Front door — unauthenticated access narrative 1

Attacker
I craft malicious Flash content that triggers improper memory handling in the ByteArray class.
Business
End users visiting compromised or attacker-controlled websites are exposed to code execution attacks.
2

Keys to the kingdom — privilege/identity takeover narrative 2

Attacker
I exploit the use-after-free condition to corrupt memory and gain control of program execution.
Business
Attackers establish persistent access to affected systems, enabling data theft, malware installation, or lateral movement.
3

Lateral reach — past segmentation narrative 3

Attacker
I deliver the exploit through web browsers or embedded Flash content in documents.
Business
Organizations face widespread compromise across user endpoints without requiring user interaction beyond normal browsing.
04

What to do

— defensible action
  • Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05

Coverage & confidence

— what we know, and what we don’t

Established (cited)

  • KEV listing (CISA)
  • EPSS probability (FIRST)
  • Public PoC available (VulnCheck)
  • 27 reported-exploitation source(s)
  • CWE weakness mapping (NVD)
  • Public exploit availability
  • Catalogued by adobe (CNA)

    • Coverage gaps — stated, not hidden

  • No EUVD / GCVE mirror in feed — single-authority dependency for the identifier.
  • EPSS & exposure are time-varying; verify live at the source.
  • Threat-actor attribution not established from feed data — absence of a name is not absence of compromise.
  • No finder/reporter credit recorded in the public CVE entry — the work behind this find is unattributed.
    • Disclosure & credit2
    Catalogued by adobeCNA
    Credited with finding itNo finder named in the public CVE record — the work behind this find is unattributed.