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CVE-2020-14145

MediumPublished

The client side in OpenSSH 5.7 through 8.4 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows...

Published: Jun 29, 2020
Updated: Dec 18, 2025
Assigning CNA: mitre
Evidence observed: Aug 28, 2026

Primary CVSS

5.9/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS probability estimate

2.1%

Low · next 30 days

Percentile: 80.2%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

The client side in OpenSSH 5.7 through 8.4 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client). NOTE: some reports state that 8.5 and 8.6 are also affected.

Sources

NoregresshExploit
CVE-2024-6387 and more Checker and Exploiter - Reverse/Bind-Shell Support. education only

Responsible use

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