CVE-2018-7243
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 authorization bypass vulnerability exists In Schneider Electric's 66074 MGE Network Management Card Transverse installed in MGE UPS and MGE STS. The integrated web server (Port 80/443/TCP) of the affected devices could allow a remote attacker to get a full access to device, bypassing the authorization system.
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 confidenceThe Schneider Electric 66074 MGE Network Management Card Transverse contains an authorization bypass vulnerability in its integrated web server (ports 80/443/TCP). Attackers can exploit this flaw to completely bypass the authentication system and gain full administrative access to the affected UPS or STS device remotely.
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 dataall versionsCVSS 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.
-
Identify the Schneider Electric device on your networkScan your network for the Schneider Electric 66074 MGE Network Management Card Transverse device. Check device inventory or perform network discovery to locate any UPS or STS devices with integrated network management cards.Affected if The device model 66074 MGE Network Management Card Transverse is present on your network.
-
Verify the web server is exposedScan ports 80/TCP and 443/TCP to determine if the integrated web server of the management card is accessible. Use a port scanner or netcat to check: nc -zv <device_ip> 80 and nc -zv <device_ip> 443.Affected if The web interface is accessible on ports 80 or 443.
-
Confirm the device firmware versionAccess the web interface or use SNMP to query the device for its firmware version. If the web interface is accessible, log in and navigate to the About or System Information page to retrieve the firmware version number.Affected if The firmware version matches the Schneider Electric 66074 MGE Network Management Card Transverse (all versions are affected).
-
Test for authentication bypass vulnerabilityAttempt to access protected administrative pages or API endpoints directly without providing credentials. For example, try accessing main administrative URLs without session cookies or authentication tokens to see if the request is granted.Affected if Protected administrative functions are accessible without authentication.
You are affected if the Schneider Electric 66074 MGE Network Management Card Transverse device with its web interface exposed on ports 80/443 is present in your environment.
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 the vendor-supplied firmware patch to the Network Management Card, or if no patch is available, place the device behind a firewall and restrict network access to trusted IPs to reduce attack surface.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,272.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-7243 — 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-2018-7243 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
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.
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