Is CVE-2009-4324 being actively exploited?

Yes. CVE-2009-4324 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on June 8, 2022.

What is the CVSS score for CVE-2009-4324?

CVE-2009-4324 has a CVSS 3.1 base score of 7.8 (HIGH).

CVE-2009-4324

HIGH · CVSS 7.8CISA KEV: actively exploitedEPSS 81.9%EU EUVD: exploited

Use-after-free vulnerability in the Doc.media.newPlayer method in Multimedia.api in Adobe Reader and Acrobat 9.x before 9.3, and 8.x before 8.2 on Windows and Mac OS X, allows remote attackers to execute arbitrary code via a crafted PDF file using ZLib compressed streams, as exploited in the wild in December 2009.

Key facts

CVSS score: 7.8 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-416
EPSS score: 81.9% (100th percentile)
In CISA KEV: Yes, added June 8, 2022
In EU EUVD: Yes (EUVD-2009-4292)
Published: December 15, 2009
NVD last modified: June 16, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Adobe Acrobat and Reader Use-After-Free Vulnerability

Added to the KEV catalog on June 8, 2022; federal remediation due June 22, 2022.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2009-4292 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on October 22, 2025.

View on the EU Vulnerability Database

Affected products

adobe / acrobat
adobe / acrobat reader
apple / mac os x
microsoft / windows
opensuse / opensuse
opensuse / opensuse
suse / linux enterprise
suse / linux enterprise
suse / linux enterprise debuginfo

References

http://blogs.adobe.com/psirt/2009/12/new_adobe_reader_and_acrobat_v.html(Broken Link, Vendor Advisory)
http://contagiodump.blogspot.com/2009/12/virustotal-httpwww.html(Exploit, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00009.html(Mailing List, Third Party Advisory)
http://osvdb.org/60980(Broken Link)
http://secunia.com/advisories/37690(Broken Link, Vendor Advisory)
http://secunia.com/advisories/38138(Broken Link, Vendor Advisory)
http://secunia.com/advisories/38215(Broken Link, Vendor Advisory)
http://www.adobe.com/support/security/advisories/apsa09-07.html(Vendor Advisory)
http://www.adobe.com/support/security/bulletins/apsb10-02.html(Not Applicable)
http://www.kb.cert.org/vuls/id/508357(Third Party Advisory, US Government Resource)
http://www.metasploit.com/redmine/projects/framework/repository/revisions/7881/entry/modules/exploits/windows/fileformat/adobe_media_newplayer.rb(Broken Link)
http://www.redhat.com/support/errata/RHSA-2010-0060.html(Broken Link)
http://www.securityfocus.com/bid/37331(Broken Link, Third Party Advisory, VDB Entry)
http://www.shadowserver.org/wiki/pmwiki.php/Calendar/20091214(Broken Link)
http://www.symantec.com/connect/blogs/zero-day-xmas-present(Broken Link)
http://www.us-cert.gov/cas/techalerts/TA10-013A.html(Third Party Advisory, US Government Resource)
http://www.vupen.com/english/advisories/2009/3518(Broken Link, Vendor Advisory)
http://www.vupen.com/english/advisories/2010/0103(Broken Link)
https://bugzilla.redhat.com/show_bug.cgi?id=547799(Issue Tracking)
https://exchange.xforce.ibmcloud.com/vulnerabilities/54747(Third Party Advisory, VDB Entry)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6795(Broken Link)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2009-4324(US Government Resource)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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