dbcve.org
AleosOperating system · Sierrawireless

CVE-2023-40459

HIGH · 7.5 CVSS v3.1 Published 2023-12-04
Fix available
A fix is available. Upgrade to after 4.16.0 or later.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

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 · unedited
The ACEManager component of ALEOS 4.16 and earlier does not adequately perform input sanitization during authentication, which could potentially result in a Denial of Service (DoS) condition for ACEManager without impairing other router functions. ACEManager recovers from the DoS condition by restarting within ten seconds of becoming unavailable.

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 · high confidence

The ACEManager component of ALEOS 4.16 and earlier fails to adequately sanitize inputs during the authentication process, which can potentially trigger a Denial of Service condition causing ACEManager to become unavailable. The component self-recovers by automatically restarting within ten seconds without affecting other router functions.

MitigationUpgrade to a patched version of ALEOS beyond 4.16 when available; until then, consider network segmentation to limit exposure of the ACEManager interface and monitor for repeated authentication failures that may indicate exploitation attempts.

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
AleosOperating system
Affected:<= 4.16.0

CVSS 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
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 checks

Work through these to decide whether this CVE applies to you.

  1. Check the ALEOS firmware version
    Access the router's web interface or CLI and look for the firmware version information, typically found in the system status or about page
    Affected if The version is 4.16.0 or earlier (any version up to and including 4.16.0)
  2. Verify ACEManager is accessible
    Confirm that the ACEManager web interface is reachable on the network (typically ports 80/443 or configured management ports)
    Affected if ACEManager is exposed and the ALEOS version is 4.16.0 or earlier
  3. Check for ACEManager restart logs
    Review router logs or ACEManager logs for entries indicating unexpected restarts or crashes of the ACEManager service, particularly around authentication activity
    Affected if Repeated ACEManager restarts occur without manual intervention and version is affected
  4. Identify network exposure of management interface
    Check router network configuration to determine if the ACEManager interface is accessible from untrusted networks (WAN side)
    Affected if ACEManager is accessible from external networks and ALEOS version is 4.16.0 or earlier

You are affected if your ALEOS firmware version is 4.16.0 or earlier and the ACEManager component is accessible on your network.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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.

dbcve · scoped
Upgrade available Upgrade to a release after 4.16.0
Interim mitigation

Upgrade to a patched version of ALEOS beyond 4.16 when available; until then, consider network segmentation to limit exposure of the ACEManager interface and monitor for repeated authentication failures that may indicate exploitation attempts.

Recommended fix Moderate confidence

Aleos version greater than 4.16.0 (contact Sierra Wireless for exact fixed version)

  1. Contact Sierra Wireless technical support or visit source.sierrawireless.com to obtain the fixed Aleos release
  2. Confirm the specific version number containing the security fix (typically a point release after 4.16.0)
  3. Download the firmware update from the official Sierra Wireless source
  4. Follow the standard Aleos firmware upgrade procedure for your specific device model
  5. Verify the ACEManager component is operational after the update
Caveat Review release notes for any configuration or feature changes between 4.16.0 and the fixed version

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Aleos Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA2.0 h
20.0 hours of engineering $3,500
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,600.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2023-40459 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-40459 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

What this is

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.

What belongs here
  • 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