CVE-2009-4241

CVE-2009-4241 is a critical-severity vulnerability in Realnetworks Realplayer with a CVSS 2.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

• Severity: Critical (CVSS 2.0 base score 9.3)
• EPSS exploit prediction: 7% (93rd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-119
• Affected product: Realnetworks Realplayer
• Published: 2010-01-25
• Last modified: 2026-06-16

Description

Heap-based buffer overflow in 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 allows remote attackers to execute arbitrary code via a file with invalid ASMRuleBook structures that trigger heap memory corruption.

Frequently asked questions

What is CVE-2009-4241?

Heap-based buffer overflow in 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 allows remote attackers to execute arbitrary code via a file with invalid ASMRuleBook structures that trigger heap memory corruption.

How severe is CVE-2009-4241?

CVE-2009-4241 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2009-4241 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-4241?

CVE-2009-4241 primarily affects Realnetworks Realplayer. In total, 18 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-4241?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2009-4241 published?

CVE-2009-4241 was published on 2010-01-25 and last updated on 2026-06-16.

References

• http://secunia.com/advisories/38218
• http://securitytracker.com/id?1023489
• http://service.real.com/realplayer/security/01192010_player/en/
• http://www.securityfocus.com/archive/1/509100/100/0/threaded
• http://www.securityfocus.com/bid/37880
• http://www.vupen.com/english/advisories/2010/0178
• http://www.zerodayinitiative.com/advisories/ZDI-10-005/
• https://exchange.xforce.ibmcloud.com/vulnerabilities/55794

Affected products (18)

• cpe:2.3:a:realnetworks:realplayer:10.0:*:*:*:*:*:*:*
• cpe:2.3:a:realnetworks:realplayer:10.5:*:*:*:*:*:*:*
• cpe:2.3:a:realnetworks:realplayer:11.0:*:*:*:*:*:*:*
• cpe:2.3:a:realnetworks:realplayer:11.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:realnetworks:realplayer:11.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:realnetworks:realplayer:11.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:realnetworks:realplayer:11.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:realnetworks:realplayer:11.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:realnetworks:realplayer_enterprise:*:*:*:*:*:*:*:*
• cpe:2.3:a:realnetworks:realplayer_sp:1.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:realnetworks:realplayer_sp:1.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:realnetworks:realplayer:10.1:*:*:*:*:*:*:*
• cpe:2.3:a:realnetworks:helix_player:10.0:*:*:*:*:*:*:*
• cpe:2.3:a:realnetworks:helix_player:11.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:realnetworks:helix_player:11.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:realnetworks:realplayer:10.0:*:linux:*:*:*:*:*
• cpe:2.3:a:realnetworks:realplayer:11.0.0:*:linux:*:*:*:*:*
• cpe:2.3:a:realnetworks:realplayer:11.0.1:*:linux:*:*:*:*:*

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