CVE-2023-40458
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 · uneditedLoop with Unreachable Exit Condition ('Infinite Loop') vulnerability in Sierra Wireless, Inc ALEOS could potentially allow a remote attacker to trigger a Denial of Service (DoS) condition for ACEManager without impairing other router functions. This condition is cleared by restarting the device.
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 confidenceSierra Wireless ALEOS firmware contains an infinite loop vulnerability in the ACEManager component that can be triggered remotely, causing ACEManager to become unresponsive while other router functions continue operating normally.
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<= 4.9.8>= 4.10.0, <= 4.16.2CVSS 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 checksWork through these to decide whether this CVE applies to you.
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Identify Sierra Wireless ALEOS deviceLocate Sierra Wireless router or gateway hardware in your environment. Check device labels, management interface, or network inventory for Sierra Wireless product identifiers.Affected if Device is a Sierra Wireless router/gateway running ALEOS firmware
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Determine ALEOS firmware versionAccess the router's web interface or CLI and navigate to System Information or use 'AT!info' command to retrieve the firmware version.Affected if Firmware version is <= 4.9.8 OR >= 4.10.0 and <= 4.16.2
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Verify ACEManager accessibilityCheck router network configuration to determine if ACEManager (typically ports 80/443 or custom HTTP service) is exposed to network segments accessible remotely.Affected if ACEManager is reachable from untrusted networks (WAN, DMZ, or untrusted LAN segments)
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Check for ACEManager unresponsivenessMonitor ACEManager web interface availability or ping the device HTTP endpoint. If previously responsive but now timing out while device ping/other services still work, ACEManager may be in infinite loop state.Affected if ACEManager web interface is unresponsive while device remains reachable via other means
A Sierra Wireless ALEOS device with firmware version 4.16.2 or earlier, where ACEManager is network-accessible, is affected by this CVE and could become unresponsive to remote trigger.
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 dataApply vendor firmware patches when available; until then, implement network segmentation to restrict access to ACEManager and monitor for DoS conditions requiring device restart.
- Consultation3.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-40458 — 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-2023-40458 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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- 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
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