CVE-2023-48251
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe vulnerability allows a remote attacker to authenticate to the SSH service with root privileges through a hidden hard-coded account.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceA hardcoded SSH credential provides a hidden root account that bypasses normal authentication. Attackers with network access to the SSH service can directly authenticate as root without any legitimate credentials, exploiting a deliberate backdoor in the system.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data>= 1000, <= 1500-sp2CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify Bosch Nexo Os installationCheck system inventory, running services, or documentation for any deployment of Bosch Nexo Os. Look for the service name 'Nexo' or related processes on the network.Affected if Bosch Nexo Os is deployed in the environment
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Determine installed versionLocate the installed version of Bosch Nexo Os. Check the application UI, system configuration files, or CLI tools provided by the product. Compare the version number against the affected range: 1000 through 1500-sp2 inclusive.Affected if The installed version falls within 1000 to 1500-sp2 (inclusive)
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Verify SSH service exposureCheck if the SSH service is enabled and accessible on the Nexo Os device. Review firewall rules, network access controls, and SSH daemon configuration to confirm network exposure.Affected if SSH service is enabled and reachable from network (authenticated or unauthenticated)
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Inspect SSH configuration for unauthorized accountsExamine the SSH daemon configuration (typically /etc/ssh/sshd_config or equivalent) and user account databases for any root-level accounts beyond those intentionally provisioned. Look for accounts not created through normal administrative procedures.Affected if A hidden or undocumented root account exists in the SSH configuration or user database
A user is affected if they have Bosch Nexo Os versions 1000-1500-sp2 deployed with SSH service exposed, and an unauthorized root account exists in the SSH configuration.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataLocate and remove the hardcoded account from the system configuration or application code, audit for additional backdoors or compromised components, rotate all credentials, and apply vendor patches if available.
- Consultation6.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,048.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-48251 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-48251 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data