CVE-2015-8403

CRITICAL

Use-after-free vulnerability in Adobe Flash Player before 18.0.0.268 and 19.x and 20.x before 20.0.0.228 on Windows and OS X and before 11.2.202.554 on Linux, Adobe AIR before 20.0.0.204, Adobe AIR...

Affects 9 products across 5 vendors.

CVSS 2.010.0
EPSS5.8%
Percentile93th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity.
◆ AI Analysis — automated analysis, not human-reviewed

This vulnerability was disclosed in 2015. A critical vulnerability affects Adobe systems (CVE-2015-8403). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2015-GLOBAL-106905-C • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2015-8403?
This vulnerability was disclosed in 2015. A critical vulnerability affects Adobe systems (CVE-2015-8403). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-2015-8403?
CVE-2015-8403 has CVSS 10.0 (Critical). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. EPSS: 5.8%.
Is CVE-2015-8403 actively exploited?
No confirmed active exploitation of CVE-2015-8403 as of 2026-09-25.
How do I remediate CVE-2015-8403?
Priority: MEDIUM.
What systems are affected by CVE-2015-8403?
CVE-2015-8403 affects Adobe Air Sdk, Air Sdk & Compiler, Flash Player, Air.
Vulnerability Details
CVE IDCVE-2015-8403
BSIDBS-2015-GLOBAL-106905-C BreachSpider Global ID
CVSS VectorAV:N/AC:L/Au:N/C:C/I:C/A:C
Published2015-12-10
Last Modified2026-06-17
ICS Relevance0%
SourceNVD
Official Description

Use-after-free vulnerability in Adobe Flash Player before 18.0.0.268 and 19.x and 20.x before 20.0.0.228 on Windows and OS X and before 11.2.202.554 on Linux, Adobe AIR before 20.0.0.204, Adobe AIR SDK before 20.0.0.204, and Adobe AIR SDK & Compiler before 20.0.0.204 allows attackers to execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2015-8048, CVE-2015-8049, CVE-2015-8050, CVE-2015-8055, CVE-2015-8056, CVE-2015-8057, CVE-2015-8058, CVE-2015-8059, CVE-2015-8061, CVE-2015-8062, CVE-2015-8063, CVE-2015-8064, CVE-2015-8065, CVE-2015-8066, CVE-2015-8067, CVE-2015-8068, CVE-2015-8069, CVE-2015-8070, CVE-2015-8071, CVE-2015-8401, CVE-2015-8402, CVE-2015-8404, CVE-2015-8405, CVE-2015-8406, CVE-2015-8410, CVE-2015-8411, CVE-2015-8412, CVE-2015-8413, CVE-2015-8414, CVE-2015-8420, CVE-2015-8421, CVE-2015-8422, CVE-2015-8423, CVE-2015-8424, CVE-2015-8425, CVE-2015-8426, CVE-2015-8427, CVE-2015-8428, CVE-2015-8429, CVE-2015-8430, CVE-2015-8431, CVE-2015-8432, CVE-2015-8433, CVE-2015-8434, CVE-2015-8435, CVE-2015-8436, CVE-2015-8437, CVE-2015-8441, CVE-2015-8442, CVE-2015-8447, CVE-2015-8448, CVE-2015-8449, CVE-2015-8450, CVE-2015-8452, and CVE-2015-8454.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: Use-after-free vulnerability in Adobe Flash Player before 18.0.0.268 and 19.x and 20.x before 20.0.0.228 on Windows and OS X and before 11.2.202.554 on Linux, Adobe AIR before 20.0.0.204, Adobe AIR SDK before 20.0.0.204, and Adobe AIR SDK & Compiler before 20.0.0.204 allows attackers to execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2015-8048, CVE-2015-8049, CVE-2015-8050, CVE-2015-8055, CVE-2015-8056, CVE-2015-8057, CVE-2015-8058, CVE-2015-8059, CVE-2015-8061 CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C.

Exploitation Likelihood: LOW

Affected Products
VendorProductAffected Versions
Adobe Air Sdk ≤ 19.0.0.241
Adobe Air Sdk & Compiler ≤ 19.0.0.241
Adobe Flash Player 19.0.0.185 19.0.0.207 19.0.0.226 19.0.0.245 ≤ 18.0.0.261
Adobe Air ≤ 19.0.0.241

Platforms listed by the source (the vulnerable product runs on these; they are not themselves vulnerable): Apple Mac Os X, Apple Iphone Os, Google Android, Linux Linux Kernel, Microsoft Windows

Remediation

No patch URL on record. Monitor vendor security advisories directly.

Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 3962 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Modelrule-based-v1
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hash5131c66716f71bf3233580161c8492652b169058af4270f2f0b4ecc9d41b748380004c02aa5ec4a471e891e5852f4c0625d4c1c74ec332ecb0714dca66eca3f2
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