Description
PuTTY through 0.75 proceeds with establishing an SSH session even if it has never sent a substantive authentication response. This makes it easier for an attacker-controlled SSH server to present a later spoofed authentication prompt (that the attacker can use to capture credential data, and use that data for purposes that are undesired by the client user).
Published: 2021-07-09
Score: 8.1 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-3794-1 putty security update
Debian DSA Debian DSA DSA-5588-1 putty security update
History

Wed, 25 Feb 2026 18:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:putty:putty:-:*:*:*:*:*:*:*
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-04T00:54:51.472Z

Reserved: 2021-07-09T00:00:00.000Z

Link: CVE-2021-36367

cve-icon Vulnrichment

Updated: 2024-08-04T00:54:51.472Z

cve-icon NVD

Status : Modified

Published: 2021-07-09T21:15:08.540

Modified: 2024-11-21T06:13:36.733

Link: CVE-2021-36367

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses