How severe is CVE-2009-0263?

CVE-2009-0263 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2009-0263 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0263?

CVE-2009-0263 primarily affects Nullsoft Winamp. In total, 83 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0263?

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-2009-0263 published?

CVE-2009-0263 was published on 2009-01-23 and last updated on 2026-06-16.

CVE-2009-0263

CVE-2009-0263 is a critical-severity vulnerability in Nullsoft Winamp with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 17% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 17% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Nullsoft Winamp
Published: 2009-01-23
Last modified: 2026-06-16

Description

Multiple buffer overflows in Winamp 5.541 and earlier allow remote attackers to cause a denial of service and possibly execute arbitrary code via (1) a large Common Chunk (COMM) header value in an AIFF file and (2) a large invalid value in an MP3 file.

Frequently asked questions

What is CVE-2009-0263?: Multiple buffer overflows in Winamp 5.541 and earlier allow remote attackers to cause a denial of service and possibly execute arbitrary code via (1) a large Common Chunk (COMM) header value in an AIFF file and (2) a large invalid value in an MP3 file.
How severe is CVE-2009-0263?: CVE-2009-0263 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2009-0263 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0263?: CVE-2009-0263 primarily affects Nullsoft Winamp. In total, 83 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0263?: 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-2009-0263 published?: CVE-2009-0263 was published on 2009-01-23 and last updated on 2026-06-16.

References

Affected products (83)

cpe:2.3:a:nullsoft:winamp:*:*:*:*:*:*:*:*
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:2.6x:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.7x:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.91:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:2.95:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:3.0:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:3.1:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:5.0:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:5.0.1:*:*:*:*:*:*:*

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