How severe is CVE-2001-1476?

CVE-2001-1476 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2001-1476 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-1476?

CVE-2001-1476 primarily affects Ssh. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2001-1476?

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-2001-1476 published?

CVE-2001-1476 was published on 2001-01-18 and last updated on 2026-06-16.

CVE-2001-1476

CVE-2001-1476 is a high-severity vulnerability in Ssh 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: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Ssh
Published: 2001-01-18
Last modified: 2026-06-16

Description

SSH before 2.0, with RC4 encryption and the "disallow NULL passwords" option enabled, makes it easier for remote attackers to guess portions of user passwords by replaying user sessions with certain modifications, which trigger different messages depending on whether the guess is correct or not.

Frequently asked questions

What is CVE-2001-1476?: SSH before 2.0, with RC4 encryption and the "disallow NULL passwords" option enabled, makes it easier for remote attackers to guess portions of user passwords by replaying user sessions with certain modifications, which trigger different messages depending on whether the guess is correct or not.
How severe is CVE-2001-1476?: CVE-2001-1476 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2001-1476 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-1476?: CVE-2001-1476 primarily affects Ssh. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2001-1476?: 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-2001-1476 published?: CVE-2001-1476 was published on 2001-01-18 and last updated on 2026-06-16.

References

Affected products (8)

cpe:2.3:a:ssh:ssh:1.2.24:*:*:*:*:*:*:*
cpe:2.3:a:ssh:ssh:1.2.25:*:*:*:*:*:*:*
cpe:2.3:a:ssh:ssh:1.2.26:*:*:*:*:*:*:*
cpe:2.3:a:ssh:ssh:1.2.27:*:*:*:*:*:*:*
cpe:2.3:a:ssh:ssh:1.2.28:*:*:*:*:*:*:*
cpe:2.3:a:ssh:ssh:1.2.29:*:*:*:*:*:*:*
cpe:2.3:a:ssh:ssh:1.2.30:*:*:*:*:*:*:*
cpe:2.3:a:ssh:ssh:1.2.31:*:*:*:*:*:*:*

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