How severe is CVE-2000-0306?

CVE-2000-0306 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2000-0306 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2000-0306?

CVE-2000-0306 affects Sco Openserver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2000-0306?

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-2000-0306 published?

CVE-2000-0306 was published on 2001-03-12 and last updated on 2026-06-16.

CVE-2000-0306

CVE-2000-0306 is a critical-severity vulnerability in Sco Openserver 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: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Sco Openserver
Published: 2001-03-12
Last modified: 2026-06-16

Description

Buffer overflow in calserver in SCO OpenServer allows remote attackers to gain root access via a long message.

Frequently asked questions

What is CVE-2000-0306?: Buffer overflow in calserver in SCO OpenServer allows remote attackers to gain root access via a long message.
How severe is CVE-2000-0306?: CVE-2000-0306 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2000-0306 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2000-0306?: CVE-2000-0306 affects Sco Openserver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2000-0306?: 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-2000-0306 published?: CVE-2000-0306 was published on 2001-03-12 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:sco:openserver:*:*:*:*:*:*:*:*

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