CVE-2020-27254
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 · uneditedEmerson Rosemount X-STREAM Gas AnalyzerX-STREAM enhanced XEGP, XEGK, XEFD, XEXF – all revisions, The affected products are vulnerable to improper authentication for accessing log and backup data, which could allow an attacker with a specially crafted URL to obtain access to sensitive information.
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 Emerson Rosemount X-STREAM Gas Analyzer (XEGP, XEGK, XEFD, XEXF) contains an improper authentication vulnerability allowing access to sensitive log and backup data through specially crafted URLs without proper credentials.
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 versionsall versionsall versionsall 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
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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 the device modelAccess the device's web interface or check the physical/device labeling to confirm the model number is one of: XEGP, XEGK, XEFD, or XEXF. This can be done via the device's management interface or SNMP if available.Affected if The device model is any of the four affected variants (XEGP, XEGK, XEFD, XEXF)
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Confirm firmware version is presentAccess the device's web interface or administrative console and locate the firmware version information. This is typically found in the system status, about, or diagnostics pages.Affected if Firmware version information is returned (indicating the device is running and accessible)
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Verify web service is runningAttempt to access the device's HTTP/HTTPS web interface by navigating to the device's IP address in a web browser or using a tool like curl or wget.Affected if The web interface responds (device is network accessible and web service is active)
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Test for unauthenticated log accessAttempt to access common log file URLs on the device without providing any credentials. Try accessing paths that typically contain log data (such as /logs, /log, /data/logs, or similar patterns) by sending HTTP GET requests without authentication headers.Affected if Log data or log file listings are returned without requiring login credentials
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Test for unauthenticated backup accessAttempt to access backup file URLs on the device without authentication. Try accessing paths that typically contain backup or configuration data (such as /backup, /config, /data/backup, or similar patterns) by sending HTTP GET requests without authentication.Affected if Backup files, configuration files, or backup directory listings are returned without requiring authentication
If the device is an Emerson X-STREAM model XEGP, XEGK, XEFD, or XEXF and its web interface allows access to log or backup data without any credentials, the environment 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 dataImplement proper authentication enforcement for all log and backup data access points; until vendor patch is available, restrict network access to the device and monitor for suspicious URL patterns.
- Consultation8.0 h
- Implementation4.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,304.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-27254 — 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-2020-27254 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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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
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