How severe is CVE-2001-0155?

CVE-2001-0155 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2001-0155 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-0155?

CVE-2001-0155 affects Van Dyke Technologies Vshell. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2001-0155?

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-2001-0155 published?

CVE-2001-0155 was published on 2001-06-02 and last updated on 2026-06-16.

CVE-2001-0155

CVE-2001-0155 is a high-severity vulnerability in Van Dyke Technologies Vshell with a CVSS 2.0 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 2.0 base score 7.5)
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Van Dyke Technologies Vshell
Published: 2001-06-02
Last modified: 2026-06-16

Description

Format string vulnerability in VShell SSH gateway 1.0.1 and earlier allows remote attackers to execute arbitrary commands via a user name that contains format string specifiers.

Frequently asked questions

What is CVE-2001-0155?: Format string vulnerability in VShell SSH gateway 1.0.1 and earlier allows remote attackers to execute arbitrary commands via a user name that contains format string specifiers.
How severe is CVE-2001-0155?: CVE-2001-0155 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2001-0155 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-0155?: CVE-2001-0155 affects Van Dyke Technologies Vshell. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2001-0155?: 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-2001-0155 published?: CVE-2001-0155 was published on 2001-06-02 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:van_dyke_technologies:vshell:*:*:*:*:*:*:*:*

More vulnerabilities in Van Dyke Technologies Vshell

CVE-2007-6031 — High (CVSS 7.8): Unspecified vulnerability in VanDyke VShell 3.0.1 allows remote attackers to cause a denial of service via unspecified…
CVE-2001-0156 — Low (CVSS 2.1): VShell SSH gateway 1.0.1 and earlier has a default port forwarding rule of 0.0.0.0/0.0.0.0, which could allow local…

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