CVE-2021-27782
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 · uneditedHCL BigFix Mobile / Modern Client Management Admin and Config UI passwords can be brute-forced. User should be locked out for multiple invalid attempts.
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 HCL BigFix Mobile and Modern Client Management admin and configuration UI lacks brute-force protection, allowing attackers to continuously attempt password guessing without triggering account lockout. This authentication bypass vulnerability enables automated password attacks against the administrative interfaces.
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= 2.0CVSS 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 HCL BigFix Mobile installationLocate the HCL BigFix Mobile application on the system or server. Check the installed software listing or use system inventory tools to confirm the product name 'HCL BigFix Mobile' is present.Affected if The product HCL BigFix Mobile is installed and the installed version is 2.0.
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Verify the exact installed versionAccess the product's about page, version information in the control panel, or check the installation directory for version metadata. Compare the version number to the affected version 2.0.Affected if The installed version is exactly 2.0, matching the affected version range.
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Examine admin UI authentication settingsAccess the HCL BigFix Mobile administrative interface and navigate to the user management or security settings panel. Look for options related to 'failed login attempts', 'account lockout', 'brute-force protection', or 'login attempt limits'.Affected if No limit on failed login attempts is configured, or brute-force protection is disabled/not present in the admin security settings.
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Check account lockout policy configurationIn the admin console, review the user account policies. Look for any account lockout threshold settings that define how many failed attempts trigger account suspension.Affected if The account lockout threshold is set to unlimited, zero, or is not configurable, meaning accounts never lock out after failed attempts.
A system is affected if HCL BigFix Mobile version 2.0 is installed AND the admin UI security settings do not enforce a limit on failed login attempts or account lockout after failed attempts.
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 account lockout policies that temporarily disable or suspend user accounts after a defined number of failed login attempts to prevent automated brute-force password guessing.
- Consultation3.0 h
- Implementation6.0 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 $3,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-27782 — 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-2021-27782 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