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.

Published: 2001-01-18 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2001-1473 is rated Moderate Risk (63.8/100): CVSS High severity, with high exploitation likelihood (EPSS 6.27%, 93th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +1.33% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2001-1473

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 4.93% 6.27% +1.33%
2 2026-05-19 4.78% 4.93% +0.15%
3 2026-05-03 — 4.78% —

Full EPSS history (71 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2001-1473

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2001-1473

OS Trackers for CVE-2001-1473

vendor priority summary link
redhat — — https://access.redhat.com/security/cve/CVE-2001-1473

Affected software / configurations for CVE-2001-1473

Vendor Product Version Raw CPE
ssh ssh 1.2.24 cpe:2.3:a:ssh:ssh:1.2.24:*:*:*:*:*:*:*
ssh ssh 1.2.25 cpe:2.3:a:ssh:ssh:1.2.25:*:*:*:*:*:*:*
ssh ssh 1.2.26 cpe:2.3:a:ssh:ssh:1.2.26:*:*:*:*:*:*:*
ssh ssh 1.2.27 cpe:2.3:a:ssh:ssh:1.2.27:*:*:*:*:*:*:*
ssh ssh 1.2.28 cpe:2.3:a:ssh:ssh:1.2.28:*:*:*:*:*:*:*
ssh ssh 1.2.29 cpe:2.3:a:ssh:ssh:1.2.29:*:*:*:*:*:*:*
ssh ssh 1.2.30 cpe:2.3:a:ssh:ssh:1.2.30:*:*:*:*:*:*:*
ssh ssh 1.2.31 cpe:2.3:a:ssh:ssh:1.2.31:*:*:*:*:*:*:*

References for CVE-2001-1473

cvelogic Threat Intelligence