How severe is CVE-2001-0553?

CVE-2001-0553 has a CVSS 2.0 base score of 7.2, rated high severity.

Is CVE-2001-0553 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-0553?

CVE-2001-0553 affects Ssh Secure Shell. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2001-0553?

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-2001-0553 published?

CVE-2001-0553 was published on 2001-08-14 and last updated on 2026-06-16.

CVE-2001-0553

CVE-2001-0553 is a high-severity vulnerability in Ssh Secure Shell with a CVSS 2.0 base score of 7.2. 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 7.2)
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Ssh Secure Shell
Published: 2001-08-14
Last modified: 2026-06-16

Description

SSH Secure Shell 3.0.0 on Unix systems does not properly perform password authentication to the sshd2 daemon, which allows local users to gain access to accounts with short password fields, such as locked accounts that use "NP" in the password field.

Frequently asked questions

What is CVE-2001-0553?: SSH Secure Shell 3.0.0 on Unix systems does not properly perform password authentication to the sshd2 daemon, which allows local users to gain access to accounts with short password fields, such as locked accounts that use "NP" in the password field.
How severe is CVE-2001-0553?: CVE-2001-0553 has a CVSS 2.0 base score of 7.2, rated high severity.
Is CVE-2001-0553 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-0553?: CVE-2001-0553 affects Ssh Secure Shell. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2001-0553?: 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-2001-0553 published?: CVE-2001-0553 was published on 2001-08-14 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:ssh:secure_shell:3.0.0:*:*:*:*:*:*:*

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