Medium 5.9Published Jun 29, 2020

CVE-2020-14145The client side in OpenSSH 5.7 through 8.4 has an Observable Discrepancy leading to an information leak in the algorithm negotiation.

Updated under an hour ago (Oct 27, 2026, 3:23 AM ET)

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It affects Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP and 11 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP

Exploited in the last 30 days

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: 5.9 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-203
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: mitre
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.0 before V3.1.5	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name)	from V3.1.0 before V3.1.5	CISA ADP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.0 before V3.1.5	CISA ADP
openbsd openssh openbsd:openssh	from 5.7 before 8.4; 8.4; 8.5; 8.6	NVD
netapp aff_a700s_firmware netapp:aff_a700s_firmware	all versions	NVD
netapp active_iq_unified_manager netapp:active_iq_unified_manager	from 9.5	NVD
netapp hci_management_node netapp:hci_management_node	all versions	NVD
netapp ontap_select_deploy_administration_utility netapp:ontap_select_deploy_administration_utility	all versions	NVD
netapp solidfire netapp:solidfire	all versions	NVD
netapp steelstore_cloud_integrated_storage netapp:steelstore_cloud_integrated_storage	all versions	NVD
1–10 of 12

References

References

https://github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1	x-refsource-misc, patch, third-party-advisory
https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/	x-refsource-misc, third-party-advisory
https://security.netapp.com/advisory/ntap-20200709-0004/	x-refsource-confirm, third-party-advisory
http://www.openwall.com/lists/oss-security/2020/12/02/1	mailing-list, x-refsource-mlist, patch, third-party-advisory
https://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362d	x-refsource-misc, patch, third-party-advisory
https://docs.ssh-mitm.at/CVE-2020-14145.html	x-refsource-misc, third-party-advisory
https://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.py	x-refsource-misc, third-party-advisory
https://security.gentoo.org/glsa/202105-35	vendor-advisory, x-refsource-gentoo, third-party-advisory
https://cert-portal.siemens.com/productcert/html/ssa-398330.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.