CVE-2020-14145

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.

CVSS 3.1

5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

2.9% chance of exploitation in the next 30 days; higher than 87% of CVEs (scores of 2026-10-25)

CWE

CWE-203

Published

2020-06-29

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• netapp:active_iq_unified_manager
• netapp:aff_a700s_firmware
• netapp:hci_compute_node
• netapp:hci_management_node
• netapp:hci_storage_node
• netapp:ontap_select_deploy_administration_utility
• netapp:solidfire
• netapp:steelstore_cloud_integrated_storage
• openbsd:openssh

References

• http://www.openwall.com/lists/oss-security/2020/12/02/1
• https://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362d
• https://docs.ssh-mitm.at/CVE-2020-14145.html
• https://github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1
• https://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.py

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