How severe is CVE-2009-4356?

CVE-2009-4356 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2009-4356 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-4356?

CVE-2009-4356 primarily affects Nullsoft Winamp. In total, 96 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-4356?

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-2009-4356 published?

CVE-2009-4356 was published on 2009-12-18 and last updated on 2026-06-16.

CVE-2009-4356

CVE-2009-4356 is a critical-severity vulnerability in Nullsoft Winamp 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-189.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-189
Affected product: Nullsoft Winamp
Published: 2009-12-18
Last modified: 2026-06-16

Description

Multiple integer overflows in the jpeg.w5s and png.w5s filters in Winamp before 5.57 allow remote attackers to execute arbitrary code via malformed (1) JPEG or (2) PNG data in an MP3 file.

Frequently asked questions

What is CVE-2009-4356?: Multiple integer overflows in the jpeg.w5s and png.w5s filters in Winamp before 5.57 allow remote attackers to execute arbitrary code via malformed (1) JPEG or (2) PNG data in an MP3 file.
How severe is CVE-2009-4356?: CVE-2009-4356 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2009-4356 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-4356?: CVE-2009-4356 primarily affects Nullsoft Winamp. In total, 96 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-4356?: 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-2009-4356 published?: CVE-2009-4356 was published on 2009-12-18 and last updated on 2026-06-16.

References

Affected products (96)

cpe:2.3:a:nullsoft:winamp:*:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:0.20a:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:0.92:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:1.006:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:1.90:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.0:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.4:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.5e:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.6:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.6x:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.7x:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.9:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.10:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.24:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.50:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.60:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.60:*:full:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.60:*:lite:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.61:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.61:*:full:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.62:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.62:*:standard:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.64:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.64:*:standard:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.65:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.70:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.70:*:full:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.71:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.72:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.73:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.73:*:full:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.74:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.75:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.76:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.77:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.78:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.79:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.80:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.81:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.90:*:*:*:*:*:*:*

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