How severe is CVE-2001-1473?

CVE-2001-1473 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2001-1473 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-1473?

CVE-2001-1473 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-2001-1473?

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-2001-1473 published?

CVE-2001-1473 was published on 2001-01-18 and last updated on 2026-06-16.

CVE-2001-1473

CVE-2001-1473 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. The underlying weakness is classified as CWE-310.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 6% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-310
Affected product: Ssh
Published: 2001-01-18
Last modified: 2026-06-16

Description

The SSH-1 protocol allows remote servers to conduct man-in-the-middle attacks and replay a client challenge response to a target server by creating a Session ID that matches the Session ID of the target, but which uses a public key pair that is weaker than the target's public key, which allows the attacker to compute the corresponding private key and use the target's Session ID with the compromised key pair to masquerade as the target.

Frequently asked questions

What is CVE-2001-1473?: The SSH-1 protocol allows remote servers to conduct man-in-the-middle attacks and replay a client challenge response to a target server by creating a Session ID that matches the Session ID of the target, but which uses a public key pair that is weaker than the target's public key, which allows the attacker to compute the corresponding private key and use the target's Session ID with the compromised key pair to masquerade as the target.
How severe is CVE-2001-1473?: CVE-2001-1473 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2001-1473 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-1473?: CVE-2001-1473 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-2001-1473?: 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-2001-1473 published?: CVE-2001-1473 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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