CVE-2018-18852
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 · uneditedCerio DT-300N 1.1.6 through 1.1.12 devices allow OS command injection because of improper input validation of the web-interface PING feature's use of Save.cgi to execute a ping command, as exploited in the wild in October 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 Cerio DT-300N devices (firmware 1.1.6-1.1.12) contain an OS command injection vulnerability in the web interface's PING feature accessed via Save.cgi. The ping command parameter is not properly validated, allowing attackers to inject arbitrary OS commands.
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>= 1.1.6, <= 1.1.12CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:L/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 device modelAccess the device's web管理界面 or check the physical device label to confirm it is a Cerio DT-300N model.Affected if The device is not a Cerio DT-300N, this specific CVE does not apply.
-
Check the firmware versionLog into the web管理界面 and navigate to the Status or System Information page to view the installed firmware version.Affected if The firmware version is between 1.1.6 and 1.1.12 inclusive, the device falls within the affected version range.
-
Verify web management interface accessibilityConfirm the device's web interface (HTTP/HTTPS on ports 80 or 443) is reachable on the network by attempting to access the device IP in a browser.Affected if The web interface is exposed and accessible, the attack surface for this vulnerability exists.
-
Check if Save.cgi endpoint is exposedAttempt to access the Save.cgi endpoint directly by navigating to http://[device-ip]/cgi-bin/save.cgi or similar path used by the device.Affected if The Save.cgi endpoint is accessible without authentication or with default credentials, the command injection vulnerability can be exploited.
-
Confirm ping functionality is presentLocate the PING feature in the web interface menu (typically under Diagnostics, Tools, or Network utilities) and verify it uses the Save.cgi endpoint.Affected if The PING feature uses Save.cgi and accepts user-supplied parameters without sanitization, the device is vulnerable to command injection.
A Cerio DT-300N device running firmware version 1.1.6 through 1.1.12 with an accessible web interface where the Save.cgi ping feature accepts unsanitized input is affected by this CVE.
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 dataUpgrade to a patched firmware version that implements proper input validation and sanitization on the Save.cgi endpoint, or if unavailable, restrict network access to the device's web management interface.
- Consultation2.0 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 $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-18852 — 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-2018-18852 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