CVE-2021-27481
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 · uneditedZOLL Defibrillator Dashboard, v prior to 2.2, The affected products utilize an encryption key in the data exchange process, which is hardcoded. This could allow an attacker to gain 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 · moderate confidenceZOLL Defibrillator Dashboard versions prior to 2.2 contain a hardcoded encryption key used in the data exchange process between the dashboard and connected defibrillator devices. This hardcoded key, if discovered by an attacker, could be used to decrypt sensitive patient data, device communications, or authentication tokens transmitted during normal operation, potentially exposing protected health information (PHI) and compromising device communication integrity.
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< 2.2CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:L/AC:L/PR:L/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 installed Zoll Defibrillator Dashboard versionLocate the installed version of the Zoll Defibrillator Dashboard application through the application interface, about dialog, or installed programs listing on the host systemAffected if The installed version is any release prior to 2.2 (e.g., 2.0, 1.x, or unversioned)
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Locate application configuration filesSearch the application installation directory for configuration files such as config.xml, settings.conf, app.config, or similar files that store encryption or connection parametersAffected if Configuration files exist and contain encryption-related settings
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Inspect configuration for hardcoded encryption keysOpen configuration files and search for static string values that appear to be encryption keys, such as strings labeled 'key', 'encryptionKey', 'secretKey', 'cipherKey', or 32-character hexadecimal or Base64-encoded valuesAffected if A static, non-variable encryption key is found hardcoded in any configuration file
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Examine application source code or librariesIf source code or decompiled assemblies are available, search for hardcoded byte arrays, string literals, or constants that resemble encryption keys used in the data exchange processAffected if Source code or compiled binaries contain hardcoded encryption key values used for device communication
A defender is affected if the installed Zoll Defibrillator Dashboard version is prior to 2.2 AND any hardcoded encryption key is found in configuration files, source code, or application binaries.
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 data2.2
Replace the hardcoded encryption key with a dynamically generated key managed through a secure key management system (KMS) or hardware security module (HSM). Implement proper key rotation, ensure keys are never embedded in source code, and verify the fix does not break existing device communication protocols.
- Consultation8.0 h
- Implementation24.0 h
- Testing16.0 h
- Review / QA8.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $15,616.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-27481 — 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-2021-27481 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
- No spam, self-promotion, credentials, or personal data