How severe is CVE-2004-0401?

CVE-2004-0401 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2004-0401 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2004-0401?

CVE-2004-0401 primarily affects Free Software Foundation Inc. Libtasn1. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2004-0401?

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-2004-0401 published?

CVE-2004-0401 was published on 2004-07-07 and last updated on 2026-06-16.

CVE-2004-0401

CVE-2004-0401 is a critical-severity vulnerability in Free Software Foundation Inc. Libtasn1 with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Free Software Foundation Inc. Libtasn1
Published: 2004-07-07
Last modified: 2026-06-16

Description

Unknown vulnerability in libtasn1 0.1.x before 0.1.2, and 0.2.x before 0.2.7, related to the DER parsing functions.

Frequently asked questions

What is CVE-2004-0401?: Unknown vulnerability in libtasn1 0.1.x before 0.1.2, and 0.2.x before 0.2.7, related to the DER parsing functions.
How severe is CVE-2004-0401?: CVE-2004-0401 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2004-0401 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-0401?: CVE-2004-0401 primarily affects Free Software Foundation Inc. Libtasn1. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2004-0401?: 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-2004-0401 published?: CVE-2004-0401 was published on 2004-07-07 and last updated on 2026-06-16.

References

Affected products (10)

cpe:2.3:a:free_software_foundation_inc.:libtasn1:0.1:*:*:*:*:*:*:*
cpe:2.3:a:free_software_foundation_inc.:libtasn1:0.1.0:*:*:*:*:*:*:*
cpe:2.3:a:free_software_foundation_inc.:libtasn1:0.1.1:*:*:*:*:*:*:*
cpe:2.3:a:free_software_foundation_inc.:libtasn1:0.2.0:*:*:*:*:*:*:*
cpe:2.3:a:free_software_foundation_inc.:libtasn1:0.2.1:*:*:*:*:*:*:*
cpe:2.3:a:free_software_foundation_inc.:libtasn1:0.2.2:*:*:*:*:*:*:*
cpe:2.3:a:free_software_foundation_inc.:libtasn1:0.2.3:*:*:*:*:*:*:*
cpe:2.3:a:free_software_foundation_inc.:libtasn1:0.2.4:*:*:*:*:*:*:*
cpe:2.3:a:free_software_foundation_inc.:libtasn1:0.2.5:*:*:*:*:*:*:*
cpe:2.3:a:free_software_foundation_inc.:libtasn1:0.2.6:*:*:*:*:*:*:*

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