CVE-2024-54855Public exploitNetwork attack vector

SSH session interception via shared host keys

Published Jan 13, 2026 · Updated Jan 13, 2026

Hard-coded SSH host keys in Vanilla OS 2 Core image 1.1.0 allow remote attackers to impersonate SSH servers and intercept connections. The core-image embeds the same private keys under /etc/ssh in every installation instead of generating unique host keys. Exploitation requires SSH to be enabled, an attacker able to interpose on a user's connection, and the user to initiate that connection; successful spoofing exposes session data and commands to interception or modification.

CVSS severity6.4
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded SSH host keys in Vanilla OS 2 Core image 1.1.0 allow remote attackers to impersonate SSH servers and intercept connections. The core-image embeds the same private keys under /etc/ssh in every installation instead of generating unique host keys. Exploitation requires SSH to be enabled, an attacker able to interpose on a user's connection, and the user to initiate that connection; successful spoofing exposes session data and commands to interception or modification.

The record

CVE
CVE-2024-54855
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-321, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 2026Record 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

6.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:H
6.4GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:H
6.4NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-321Use of Hard-coded Cryptographic Key
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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