AUGUST 4, 2026
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Case File

CVE-2021-36367

HIGH · CVSS 8.1 EPSS 1.11%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-07-09 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 8.1. See the original NVD description below for full technical details.

CVE
CVE-2021-36367
Severity
HIGH
CVSS
8.1
EPSS
1.11%

Original NVD 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).

Related CVEs

Other vulnerabilities affecting the same vendor(s)