CVE-2009-1831

CVE-2009-1831 is a critical-severity vulnerability in Nullsoft Winamp with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 36% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-189.

Key facts

Description

The Nullsoft Modern Skins Support module (gen_ff.dll) in Nullsoft Winamp before 5.552 allows remote attackers to execute arbitrary code via a crafted MAKI file, which triggers an incorrect sign extension, an integer overflow, and a stack-based buffer overflow.

Frequently asked questions

What is CVE-2009-1831?
The Nullsoft Modern Skins Support module (gen_ff.dll) in Nullsoft Winamp before 5.552 allows remote attackers to execute arbitrary code via a crafted MAKI file, which triggers an incorrect sign extension, an integer overflow, and a stack-based buffer overflow.
How severe is CVE-2009-1831?
CVE-2009-1831 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2009-1831 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 36% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-1831?
CVE-2009-1831 primarily affects Nullsoft Winamp. In total, 84 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-1831?
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-2009-1831 published?
CVE-2009-1831 was published on 2009-05-29 and last updated on 2026-06-16.

References

Affected products (84)

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