High 9.3Published Jan 25, 2010

CVE-2009-4243RealNetworks RealPlayer 10, RealPlayer 10.5 6.0.12.1040 through 6.0.12.1741, RealPlayer 11 11.0.0 through 11.0.4, RealPlayer Enterprise, Mac RealPlayer 10 and 10.1, Linux RealPlayer 10, and Helix Pla…

Updated under an hour ago (Nov 2, 2026, 1:40 AM ET)

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It affects realnetworks realplayer and 3 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Start free and add your stackFree account, 3 products Every CVE for realnetworks realplayer Exploited in the last 30 days

RealNetworks RealPlayer 10, RealPlayer 10.5 6.0.12.1040 through 6.0.12.1741, RealPlayer 11 11.0.0 through 11.0.4, RealPlayer Enterprise, Mac RealPlayer 10 and 10.1, Linux RealPlayer 10, and Helix Player 10.x allow remote attackers to have an unspecified impact via a crafted media file that uses HTTP chunked transfer coding, related to an "overflow."

CVSS: 9.3 HIGH (v2.0, NVD)AV:N/AC:M/Au:N/C:C/I:C/A:C
Weakness (CWE): CWE-119
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

realnetworks realplayer realnetworks:realplayer	10.0; 10.5; 11.0; 11.0.1; 11.0.2; 11.0.3; 11.0.4; 11.0.5; and 7 more ranges	NVD
realnetworks realplayer_enterprise realnetworks:realplayer_enterprise	all versions	NVD
realnetworks realplayer_sp realnetworks:realplayer_sp	1.0.0; 1.0.1	NVD
realnetworks helix_player realnetworks:helix_player	10.0; 11.0.0; 11.0.1	NVD

References

References

http://osvdb.org/61967
http://secunia.com/advisories/38218	vendor-advisory
http://securitytracker.com/id?1023489	patch
http://service.real.com/realplayer/security/01192010_player/en/	patch, vendor-advisory
http://www.securityfocus.com/bid/37880
http://www.vupen.com/english/advisories/2010/0178	patch, vendor-advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/55796

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.