How severe is CVE-2001-0830?

CVE-2001-0830 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 none, integrity none, and availability high.

Is CVE-2001-0830 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-0830?

CVE-2001-0830 affects 6tunnel Project 6tunnel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2001-0830?

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-2001-0830 published?

CVE-2001-0830 was published on 2001-12-06 and last updated on 2026-06-16.

CVE-2001-0830

CVE-2001-0830 is a high-severity vulnerability in 6tunnel Project 6tunnel 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. The underlying weakness is classified as CWE-772.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-772
Affected product: 6tunnel Project 6tunnel
Published: 2001-12-06
Last modified: 2026-06-16

Description

6tunnel 0.08 and earlier does not properly close sockets that were initiated by a client, which allows remote attackers to cause a denial of service (resource exhaustion) by repeatedly connecting to and disconnecting from the server.

Frequently asked questions

What is CVE-2001-0830?: 6tunnel 0.08 and earlier does not properly close sockets that were initiated by a client, which allows remote attackers to cause a denial of service (resource exhaustion) by repeatedly connecting to and disconnecting from the server.
How severe is CVE-2001-0830?: CVE-2001-0830 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 none, integrity none, and availability high.
Is CVE-2001-0830 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-0830?: CVE-2001-0830 affects 6tunnel Project 6tunnel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2001-0830?: 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-2001-0830 published?: CVE-2001-0830 was published on 2001-12-06 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:6tunnel_project:6tunnel:*:*:*:*:*:*:*:*

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