dbcve.org
Manageengine Admanager PlusApplication · Zohocorp

CVE-2021-33911

CRITICAL · 9.8 CVSS v3.1 Published 2021-07-17
Fix available
A fix is available. Upgrade to 7.1 or later.
See remediation →
100/100
Remediation priority · Urgent
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
Zoho ManageEngine ADManager Plus before 7110 allows remote code execution.

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

Zoho ManageEngine ADManager Plus versions before 7110 contain a remote code execution vulnerability that allows unauthenticated attackers to execute arbitrary code on the affected system. The critical severity (CVSS 9.8) indicates the vulnerability is easily exploitable over the network with no user interaction required.

MitigationUpgrade Zoho ManageEngine ADManager Plus to version 7110 or later to remediate this vulnerability. Organizations unable to immediately patch should restrict network access to the application interface and monitor for Indicators of Compromise.

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
Manageengine Admanager PlusApplication
Affected:< 7.1= 7.1

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
High
Integrity
High
Availability
High

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

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

  1. Identify if ADManager Plus is installed
    Check the Windows Services list (services.msc) or Linux process list for 'ManageEngine ADManager Plus' service/process, or look for the installation directory (typically C:\ManageEngine\ADManager Plus or /opt/manageengine/admanager)
    Affected if The service or installation directory exists - proceed to version check
  2. Locate the version file
    Navigate to the ADManager Plus installation directory and look for a version file (commonly named 'version.txt', 'build.txt', or found in a 'conf' or 'build' subdirectory)
    Affected if A version file exists - read the version number from it
  3. Check version via product interface
    Access the ADManager Plus web interface and navigate to the About or Support page (typically found in the settings or help menu) to view the installed build number
    Affected if The web interface is accessible - note the build version displayed
  4. Compare installed version against affected range
    Compare your identified version number to the affected range: versions before 7.1 (such as 7.0, 6.x, 5.x) and version 7.1 are vulnerable. The fixed version is 7110 or later
    Affected if Installed version is less than 7110 (for example: 7100, 7.0, 6.9, 6.5, etc.) - your environment is affected
  5. Verify if the application is exposed to the network
    Check network configuration to determine if the ADManager Plus web interface (default port 8080 or 8443) is accessible from untrusted networks or the internet
    Affected if The interface is exposed externally without proper network segmentation or authentication proxy, the RCE vulnerability is remotely exploitable

Your environment is affected if Zoho ManageEngine ADManager Plus is installed with a version lower than 7110 (including 7.1 and versions before 7.1), regardless of whether it is internally or externally exposed.

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 7.1 or later
Fixed in 7.1
Interim mitigation

Upgrade Zoho ManageEngine ADManager Plus to version 7110 or later to remediate this vulnerability. Organizations unable to immediately patch should restrict network access to the application interface and monitor for Indicators of Compromise.

Recommended fix High confidence

ADManager Plus version 7110 (or latest stable release)

  1. Back up the current ADManager Plus installation, including the database and configuration files
  2. Stop the ADManager Plus service
  3. Download ADManager Plus version 7110 or later from the official ManageEngine downloads page (www.manageengine.com/products/ad-manager/)
  4. Install or upgrade to the downloaded version, following the on-screen installation wizard
  5. Start the ADManager Plus service
  6. Verify the upgrade was successful by logging into the admin console and confirming the version number displays 7110 or later
  7. Verify the RCE vulnerability is remediated by confirming unauthorized remote code execution is no longer possible
Caveat Review release notes for any changes to features, API endpoints, or configuration requirements that may affect existing integrations or workflows

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

Fix this in Manageengine Admanager Plus Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing12.0 h
  • Review / QA4.0 h
28.0 hours of engineering $4,760
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $7,616.

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-2021-33911 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