dbcve.org
Bigfix MobileApplication · Hcltech

CVE-2021-27780

MEDIUM · 5.3 CVSS v3.1 Published 2022-05-27
Fix available
A fix is available. Upgrade to 2.1 or later.
See remediation →
62/100
Remediation priority · Elevated
Remotely reachable No privileges Zero-click

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 · unedited
The software may be vulnerable to both Un-Auth XML interaction and unauthenticated device enrollment.

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 confidence

This vulnerability allows unauthenticated attackers to interact with XML-based interfaces and enroll new devices without proper authentication. The issues combine an authentication bypass for XML interaction endpoints and a separate flaw permitting unauthenticated device enrollment, potentially enabling unauthorized device registration or manipulation.

MitigationImplement strong authentication and authorization checks on all XML interaction endpoints and device enrollment functions. Disable unauthenticated access paths and validate all enrollment requests through proper identity verification.

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
Bigfix MobileApplication
Affected:>= 1.0, < 2.1
Modern Client ManagementApplication
Affected:>= 1.0, < 2.1

CVSS 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
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify installed product version
    Locate the installation directory or use system inventory tools to determine the exact version of Hcltech Bigfix Mobile or Hcltech Modern Client Management installed in your environment.
    Affected if The installed version is greater than or equal to 1.0 and less than 2.1
  2. Determine if XML interaction endpoints are accessible without authentication
    Review web server configuration, proxy settings, or API gateway rules to identify if XML-based interface endpoints are exposed to unauthenticated access.
    Affected if XML interaction endpoints can be accessed without providing valid authentication credentials
  3. Verify device enrollment configuration
    Examine enrollment service settings, policy configurations, or registration module parameters to check whether unauthenticated device enrollment is permitted.
    Affected if Device enrollment is enabled and allows registration without requiring authentication
  4. Check for unauthenticated access paths to enrollment functions
    Inspect access control lists, firewall rules, or application-level authorization configurations to identify any endpoints or functions that permit unauthenticated device registration or manipulation.
    Affected if There exist access paths that allow unauthorized device enrollment or manipulation without proper identity verification

You are affected if your installed version falls within 1.0 to less than 2.1 AND unauthenticated access to XML interfaces or device enrollment functions is enabled in your configuration.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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.

dbcve · scoped
Upgrade available Upgrade to 2.1 or later
Fixed in 2.1
Interim mitigation

Implement strong authentication and authorization checks on all XML interaction endpoints and device enrollment functions. Disable unauthenticated access paths and validate all enrollment requests through proper identity verification.

Recommended fix High confidence

Version 2.1 or later

  1. Back up the current Bigfix Mobile or Modern Client Management installation and configuration
  2. Download version 2.1 or later from HCL support portal (support.hcltechsw.com)
  3. Follow HCL's documented upgrade procedure for Bigfix Mobile/Modern Client Management
  4. Verify the upgrade was successful and the XML interaction and enrollment endpoints now require proper authentication

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Bigfix Mobile Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,560.

Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-27780 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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