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 ()
Does this affect you?
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.
Do this next
Free account, 1 product
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
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 |
netapp hci_compute_node netapp:hci_compute_node | all versions | NVD |
netapp hci_storage_node netapp:hci_storage_node | all versions | NVD |
References
- https://github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1x-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/2020/12/02/1mailing-list, x-refsource-mlist, patch, third-party-advisory
- https://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362dx-refsource-misc, patch, third-party-advisory
- https://docs.ssh-mitm.at/CVE-2020-14145.htmlx-refsource-misc, third-party-advisory
- https://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.pyx-refsource-misc, third-party-advisory
- https://security.gentoo.org/glsa/202105-35vendor-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.