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.

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-2001-1475 is rated Moderate Risk (55.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.54%). Review affected assets and schedule 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-2001-1475

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 1.12% 1.54% +0.42%
2 2026-03-16 1.35% 1.12% -0.23%
3 2025-12-26 — 1.35% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2001-1475

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-2001-1475

Affected software / configurations for CVE-2001-1475

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-2001-1475

cvelogic Threat Intelligence