CVE-2015-5122: in the CISA KEV catalogue
Adobe Flash Player Use-After-Free Vulnerability. CISA added CVE-2015-5122 to the Known Exploited Vulnerabilities catalogue on 2022-04-13 with a default due date of 2022-05-04. Known ransomware campaign use: Unknown. Forensic triage flag: No.
Use-after-free vulnerability in the DisplayObject class in the ActionScript 3 (AS3) implementation in Adobe Flash Player allows remote attackers to execute code or cause a denial-of-service (DoS). (CISA description)
- Vendor / product
- Adobe Flash Player
- CWE
- CWE-416
- CISA required action
- The impacted product is end-of-life and should be disconnected if still in use.
- EPSS
- 87%, percentile 99 (scored 2026-11-03)
EPSS puts about 87 in 100 odds (87%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 99% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2015-5122 in the CISA KEV catalogue?
Yes. CISA added CVE-2015-5122 (Adobe Flash Player Use-After-Free Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2022-04-13. CISA's default due date for it is 2022-05-04.
Is CVE-2015-5122 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2015-5122. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2015-5122?
CISA's required action: The impacted product is end-of-life and should be disconnected if still in use.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2015-5122