CVE-2018-11240
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 · uneditedAn issue was discovered on SoftCase T-Router build 20112017 devices. There are no restrictions on the 'exec command' feature of the T-Router protocol. If the command syntax is correct, there is code execution both on the other modem and on the main servers. This is fixed in production builds as of Spring 2018.
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 confidenceThe SoftCase T-Router (build 20112017) has an unrestricted 'exec command' feature in its T-Router protocol that allows arbitrary command execution on connected modems and main servers when valid command syntax is provided. This unauthenticated command injection vulnerability allows remote attackers to execute code on both network endpoints and backend infrastructure.
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= 20112017CVSS 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:3.0/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 T-Router firmware versionAccess the T-Router device web interface or CLI and locate the firmware/build version information, typically found in System Status, About, or Device Information pagesAffected if Firmware version is exactly 20112017 (build date November 20, 2017)
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Confirm T-Router protocol is enabledCheck device configuration to verify the T-Router protocol service is active and listening for connectionsAffected if T-Router protocol feature is enabled on the device
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Determine network accessibility of T-Router management interfaceReview firewall rules, ACLs, or network exposure settings to identify if the T-Router management interface (typically ports 80/443 or custom T-Router ports) is reachable from untrusted networksAffected if T-Router management interface is accessible from the internet or untrusted network segments without proper access restrictions
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Inspect logs for unauthorized command executionReview T-Router system logs, command history, or security event logs for unexpected exec commands, particularly those originating from external IP addresses or outside expected administration windowsAffected if Logs show exec command entries that were not initiated by legitimate administrators
A user is affected if their T-Router device runs firmware build 20112017, has the T-Router protocol enabled, and is network-accessible to potential attackers.
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.
dbcve · scopedUpgrade T-Router devices to production builds from Spring 2018 or later. If upgrading is not immediately possible, restrict network access to the T-Router management interfaces and monitor for unauthorized command execution.
Any production build released in Spring 2018 or later
- 1. Identify the current T-Router firmware version installed on the device
- 2. Contact SoftCase vendor to obtain the specific Spring 2018 production build or later
- 3. Follow the vendor's official firmware upgrade procedure to apply the fixed firmware version
- 4. After upgrading, verify that the 'exec command' feature now has proper restrictions in place
- 5. Test that the functionality still works as expected with the new permission controls
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 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 $5,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-11240 — 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-2018-11240 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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