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CVE-2015-8421 is a use-after-free vulnerability in Adobe Flash Player prior to 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, as well as in Adobe AIR before 20.0.0.204 and related SDKs. The vulnerability allows attackers to execute arbitrary code via unspecified vectors, due to improper management of memory after objects are freed. This is a distinct issue from other contemporaneous Flash Player vulnerabilities.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
No public activity tracked yet. Mallory keeps watching.
No public activity observed for this vulnerability.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
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