CVE-2020-12524
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 · uneditedUncontrolled Resource Consumption can be exploited to cause the Phoenix Contact HMIs BTP 2043W, BTP 2070W and BTP 2102W in all versions to become unresponsive and not accurately update the display content (Denial of Service).
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 confidenceUncontrolled resource consumption vulnerability in Phoenix Contact HMIs (BTP 2043W, BTP 2070W, BTP 2102W) allows attackers to cause denial of service, making devices unresponsive and preventing accurate display content updates.
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 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
- 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 HMI modelCheck the device label, web interface, or system information to confirm the exact model number (BTP 2043W, BTP 2070W, or BTP 2102W)Affected if The device is one of the three affected models (BTP 2043W, BTP 2070W, or BTP 2102W)
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Verify firmware versionAccess the device web interface or use the manufacturer's management tool to determine the installed firmware versionAffected if All firmware versions are affected, so any version confirms exposure for this check alone
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Assess network exposureReview network configuration to determine if the HMI is directly accessible from untrusted networks or the internet without firewall protectionAffected if The HMI is network-accessible from external or untrusted network segments
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Check device responsivenessPing the HMI or attempt to access its web interface to verify it responds to requests and monitor for timeout or slow responsesAffected if The device is unresponsive, times out, or exhibits significantly degraded performance
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Monitor display update functionalityObserve the HMI screen or query its status to verify display content updates are occurring properly and not frozen or delayedAffected if Display content updates are frozen, delayed, or inaccurate
Your environment is affected if you have a BTP 2043W, BTP 2070W, or BTP 2102W HMI that is network-accessible and exhibits unresponsiveness or display update issues.
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 dataSince all versions are affected with no patch specified, implement network segmentation to isolate HMIs, apply compensating controls such as rate limiting on network paths to the devices, and monitor for abnormal traffic patterns that could indicate exploitation attempts.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-12524 — 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-2020-12524 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
- No spam, self-promotion, credentials, or personal data