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CRITICAL · CVSS 9.8 CISA Known Exploited Vulnerability

CVE-2015-5119

Adobe Flash Player Use-After-Free Vulnerability

Adobe Flash Player

Use-after-free vulnerability in the ByteArray class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through 13.0.0.296 and 14.x through 18.0.0.194 on Windows and OS X and 11.x through 11.2.202.468 on Linux 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.

CVSS
9.8
CRITICAL
EPSS
99.3%
30-day exploitation
Ransomware groups
0
recorded exploiting
Published
8 Jul 2015
CWE-416

Exploitation status

CISA Known Exploited Vulnerabilities

Listed by CISA on 3 March 2022. US federal agencies were required to remediate it by 24 March 2022.

EPSS — exploitation probability

FIRST puts the probability of exploitation activity in the next 30 days at 99.3%, which is higher than 99.9% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Frequently asked questions

Is CVE-2015-5119 being exploited by ransomware groups?

No ransomware group in this database is currently recorded as exploiting CVE-2015-5119.

What does CVE-2015-5119 affect?

CVE-2015-5119 affects Adobe Flash Player. Use-after-free vulnerability in the ByteArray class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through 13.0.0.296 and 14.x through 18.0.0.194 on Windows and OS X and 11.x through 11.2.202.468 on Linux 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.

How severe is CVE-2015-5119?

CVE-2015-5119 is rated CRITICAL with a CVSS base score of 9.8. EPSS puts the probability of exploitation in the next 30 days at 99.3%, higher than 99.9% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 24 March 2022.

How should organisations respond to CVE-2015-5119?

Apply the vendor patch for Adobe Flash Player as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.