CVE-2015-5123
Adobe Flash Player Use-After-Free Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
Required action
The impacted product is end-of-life and should be disconnected if still in use.
CISA notes
https://nvd.nist.gov/vuln/detail/CVE-2015-5123
Description
Use-after-free vulnerability in the BitmapData 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 overrides a valueOf function, as exploited in the wild in July 2015.
Severity
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitation Context
as of October 13, 2026- CISA added CVE-2015-5123 to the KEV catalog 2,465 days after its CVE record was published.
- It is one of 82 Adobe entries in the CISA KEV catalog, and one of 54 added in 2022.
- Its current EPSS score (18.8%) is higher than that of 34% of CISA KEV entries.
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| - | - | n/a |
References
14 LinksRecord Details
More from Adobe
Adobe Flash Player Integer Underflow Vulnerablity
Adobe Flash Player Heap-Based Buffer Overflow Vulnerability
Adobe Flash Player Remote Code Execution Vulnerability
Adobe Flash Player Use-After-Free Vulnerability
CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.