How severe is CVE-2001-0534?

CVE-2001-0534 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2001-0534 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-2001-0534?

CVE-2001-0534 primarily affects Lucent Radius. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2001-0534?

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-2001-0534 published?

CVE-2001-0534 was published on 2001-07-21 and last updated on 2026-06-16.

CVE-2001-0534

CVE-2001-0534 is a critical-severity vulnerability in Lucent Radius 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: 7% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Lucent Radius
Published: 2001-07-21
Last modified: 2026-06-16

Description

Multiple buffer overflows in RADIUS daemon radiusd in (1) Merit 3.6b and (2) Lucent 2.1-2 RADIUS allow remote attackers to cause a denial of service or execute arbitrary commands.

Frequently asked questions

What is CVE-2001-0534?: Multiple buffer overflows in RADIUS daemon radiusd in (1) Merit 3.6b and (2) Lucent 2.1-2 RADIUS allow remote attackers to cause a denial of service or execute arbitrary commands.
How severe is CVE-2001-0534?: CVE-2001-0534 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2001-0534 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-2001-0534?: CVE-2001-0534 primarily affects Lucent Radius. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2001-0534?: 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-2001-0534 published?: CVE-2001-0534 was published on 2001-07-21 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:lucent:radius:2.1.2:*:*:*:*:*:*:*
cpe:2.3:a:merit:radius:3.6b:*:*:*:*:*:*:*

More vulnerabilities in Lucent Radius

CVE-2001-1376 — High (CVSS 7.5): Buffer overflow in digest calculation function of multiple RADIUS implementations allows remote attackers to cause a…
CVE-2001-1081 — High (CVSS 7.5): Format string vulnerabilities in Livingston/Lucent RADIUS before 2.1.va.1 may allow local or remote attackers to cause…
CVE-2001-1377 — Medium (CVSS 5.0): Multiple RADIUS implementations do not properly validate the Vendor-Length of the Vendor-Specific attribute, which…
CVE-2001-1082 — Medium (CVSS 5.0): Directory traversal vulnerability in Livingston/Lucent RADIUS before 2.1.va.1 may allow attackers to read arbitrary…

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