How severe is CVE-2013-20001?

CVE-2013-20001 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2013-20001 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-20001?

CVE-2013-20001 affects Openzfs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2013-20001?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2013-20001 published?

CVE-2013-20001 was published on 2021-02-12 and last updated on 2026-06-16.

CVE-2013-20001

CVE-2013-20001 is a high-severity vulnerability in Openzfs with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Openzfs
Published: 2021-02-12
Last modified: 2026-06-16

Description

An issue was discovered in OpenZFS through 2.0.3. When an NFS share is exported to IPv6 addresses via the sharenfs feature, there is a silent failure to parse the IPv6 address data, and access is allowed to everyone. IPv6 restrictions from the configuration are not applied.

Frequently asked questions

What is CVE-2013-20001?: An issue was discovered in OpenZFS through 2.0.3. When an NFS share is exported to IPv6 addresses via the sharenfs feature, there is a silent failure to parse the IPv6 address data, and access is allowed to everyone. IPv6 restrictions from the configuration are not applied.
How severe is CVE-2013-20001?: CVE-2013-20001 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2013-20001 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-20001?: CVE-2013-20001 affects Openzfs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2013-20001?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2013-20001 published?: CVE-2013-20001 was published on 2021-02-12 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:openzfs:openzfs:*:*:*:*:*:*:*:*

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