How severe is CVE-2009-1791?

CVE-2009-1791 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2009-1791 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-2009-1791?

CVE-2009-1791 primarily affects Mega-nerd Libsndfile. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-1791?

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-2009-1791 published?

CVE-2009-1791 was published on 2009-05-26 and last updated on 2026-06-16.

CVE-2009-1791

CVE-2009-1791 is a critical-severity vulnerability in Mega-nerd Libsndfile 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: Mega-nerd Libsndfile
Published: 2009-05-26
Last modified: 2026-06-16

Description

Heap-based buffer overflow in aiff_read_header in libsndfile 1.0.15 through 1.0.19, as used in Winamp 5.552 and possibly other media programs, allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via an AIFF file with an invalid header value.

Frequently asked questions

What is CVE-2009-1791?: Heap-based buffer overflow in aiff_read_header in libsndfile 1.0.15 through 1.0.19, as used in Winamp 5.552 and possibly other media programs, allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via an AIFF file with an invalid header value.
How severe is CVE-2009-1791?: CVE-2009-1791 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2009-1791 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-2009-1791?: CVE-2009-1791 primarily affects Mega-nerd Libsndfile. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-1791?: 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-2009-1791 published?: CVE-2009-1791 was published on 2009-05-26 and last updated on 2026-06-16.

References

Affected products (12)

cpe:2.3:a:mega-nerd:libsndfile:1.0.15:*:*:*:*:*:*:*
cpe:2.3:a:mega-nerd:libsndfile:1.0.16:*:*:*:*:*:*:*
cpe:2.3:a:mega-nerd:libsndfile:1.0.17:*:*:*:*:*:*:*
cpe:2.3:a:mega-nerd:libsndfile:1.0.18:*:*:*:*:*:*:*
cpe:2.3:a:mega-nerd:libsndfile:1.0.19:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:5.5:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:5.51:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:5.52:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:5.54:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:5.55:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:5.541:*:*:*:*:*:*:*
cpe:2.3:a:nullsoft:winamp:5.552:*:*:*:*:*:*:*

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