How severe is CVE-2001-1475?

CVE-2001-1475 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2001-1475 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-1475?

CVE-2001-1475 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-2001-1475?

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-2001-1475 published?

CVE-2001-1475 was published on 2001-01-18 and last updated on 2026-06-16.

CVE-2001-1475

CVE-2001-1475 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: 2% (72nd 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, when using RC4 and password authentication, allows remote attackers to replay messages until a new server key (VK) is generated.

Frequently asked questions

What is CVE-2001-1475?: SSH before 2.0, when using RC4 and password authentication, allows remote attackers to replay messages until a new server key (VK) is generated.
How severe is CVE-2001-1475?: CVE-2001-1475 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2001-1475 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-1475?: CVE-2001-1475 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-2001-1475?: 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-2001-1475 published?: CVE-2001-1475 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:*:*:*:*:*:*:*

More vulnerabilities in Ssh

CVE-2001-0144 — Critical (CVSS 10.0): CORE SDI SSH1 CRC-32 compensation attack detector allows remote attackers to execute arbitrary commands on an SSH…
CVE-1999-0248 — Critical (CVSS 10.0): A race condition in the authentication agent mechanism of sshd 1.2.17 allows an attacker to steal another user's…
CVE-1999-0013 — High (CVSS 8.4): Stolen credentials from SSH clients via ssh-agent program, allowing other local users to access remote accounts…
CVE-2011-0766 — High (CVSS 7.8): The random number generator in the Crypto application before 2.0.2.2, and SSH before 2.0.5, as used in the Erlang/OTP…
CVE-2001-0572 — High (CVSS 7.5): The SSH protocols 1 and 2 (aka SSH-2) as implemented in OpenSSH and other packages have various weaknesses which can…
CVE-2001-0471 — High (CVSS 7.5): SSH daemon version 1 (aka SSHD-1 or SSH-1) 1.2.30 and earlier does not log repeated login attempts, which could allow…

All CVEs affecting Ssh →