CVE-2001-0361

Implementations of SSH version 1.5, including (1) OpenSSH up to version 2.3.0, (2) AppGate, and (3) ssh-1 up to version 1.2.31, in certain configurations, allow a remote attacker to decrypt and/or alter traffic via a "Bleichenbacher attack" on PKCS#1 version 1.5.

Published: 2001-06-27 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2001-0361 is rated Moderate Risk (44.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.50%). 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-2001-0361

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 2026-07-01 2.84% 2.50% -0.34%
2 2026-06-15 1.31% 2.84% +1.53%
3 2025-12-28 — 1.31% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2001-0361

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.0 2.0 MEDIUM
AV:N/AC:H/Au:N/C:P/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 4.9 4.9 [email protected]

Weakness enumeration for CVE-2001-0361

Affected software / configurations for CVE-2001-0361

Vendor Product Version Raw CPE
openbsd openssh 1.2.3 cpe:2.3:a:openbsd:openssh:1.2.3:*:*:*:*:*:*:*
openbsd openssh 2.1 cpe:2.3:a:openbsd:openssh:2.1:*:*:*:*:*:*:*
openbsd openssh 2.1.1 cpe:2.3:a:openbsd:openssh:2.1.1:*:*:*:*:*:*:*
ssh ssh <= 1.2.31 cpe:2.3:a:ssh:ssh:*:*:*:*:*:*:*:*

References for CVE-2001-0361

cvelogic Threat Intelligence