CVE-2020-15314Public exploitNetwork attack vector

SSH traffic disclosure via hardcoded host key

Published Jun 29, 2020 · Updated Aug 4, 2024

Hardcoded SSH host key in Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 allows man-in-the-middle attackers to decrypt SSH traffic. The default /etc/ssh/ssh_host_rsa_key file contains the same embedded RSA private key across appliances, so an interceptor can impersonate the SSH service. Exploitation requires control of the network path; the documented consequence is disclosure of intercepted SSH traffic, not root-account access.

CVSS severity5.9
Medium
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hardcoded SSH host key in Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 allows man-in-the-middle attackers to decrypt SSH traffic. The default /etc/ssh/ssh_host_rsa_key file contains the same embedded RSA private key across appliances, so an interceptor can impersonate the SSH service. Exploitation requires control of the network path; the documented consequence is disclosure of intercepted SSH traffic, not root-account access.

The record

CVE
CVE-2020-15314
Published
Jun 29, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-798, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 29, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.9NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
4.3NVDAV:N/AC:M/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
T1557Adversary-in-the-Middle

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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