dbcve.org
Smart Software Manager On PremApplication · Cisco

CVE-2021-34766

HIGH · 8.8 CVSS v3.1 Published 2021-10-06
Fix available
A fix is available. Upgrade to 8-202108 or later.
See remediation →
94/100
Remediation priority · Urgent
Remotely reachable 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
A vulnerability in the web UI of Cisco Smart Software Manager On-Prem (SSM On-Prem) could allow an authenticated, remote attacker to elevate privileges and create, read, update, or delete records and settings in multiple functions. This vulnerability is due to insufficient authorization of the System User and System Operator role capabilities. An attacker could exploit this vulnerability by directly accessing a web resource. A successful exploit could allow the attacker to create, read, update, or delete records and settings in multiple functions without the necessary permissions on the web UI.

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 · high confidence

This is an authorization bypass vulnerability in Cisco SSM On-Prem's web UI where authenticated users with System User or System Operator roles can directly access web resources they shouldn't have permission to access, allowing them to create, read, update, or delete records and settings beyond their intended role capabilities.

MitigationApply the Cisco vendor patch for CVE-2021-34766 when available. In the interim, limit network exposure of the SSM On-Prem web interface and monitor for unauthorized administrative actions.

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
Smart Software Manager On PremApplication
Affected:< 8-202108

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
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/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. Confirm SSM On-Prem is deployed
    Identify whether Cisco Smart Software Manager On-Prem is installed in your environment. Check for the web application accessible on port 443/8443 or inspect running services for Cisco SSM On-Prem processes.
    Affected if SSM On-Prem is present in the environment and accessible via web UI
  2. Identify the installed version
    Access the SSM On-Prem web UI and navigate to the About or System Information page to view the exact version number. Alternatively, check the version through the command-line interface if available.
    Affected if The installed version is lower than 8-202108 (for example, 7-202106, 6-202101, etc.)
  3. Review user accounts and roles
    Log into the SSM On-Prem administrative interface and navigate to the User Management or Administration section. List all configured users and their assigned roles.
    Affected if There are users assigned the System User or System Operator roles in the system
  4. Verify role-based access controls
    As a System User or System Operator account, attempt to access web resources or administrative functions outside your assigned role permissions to test whether authorization bypass is possible.
    Affected if A user with System User or System Operator role can access resources or perform actions outside their intended permissions

You are affected if SSM On-Prem is running with a version lower than 8-202108 and you have users with System User or System Operator roles configured in the system.

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 8-202108 or later
Fixed in 8-202108
Interim mitigation

Apply the Cisco vendor patch for CVE-2021-34766 when available. In the interim, limit network exposure of the SSM On-Prem web interface and monitor for unauthorized administrative actions.

Recommended fix Moderate confidence

Cisco Smart Software Manager On-Prem version 8-202108 or later

  1. Verify the current installed version of Cisco Smart Software Manager On-Prem (SSM On-Prem)
  2. Access the Cisco Smart Software Manager On-Prem administration interface
  3. Navigate to the system update or upgrade section
  4. Upgrade to version 8-202108 or later (the fixed release)
  5. After upgrade, verify the system is functioning correctly
  6. Confirm the System User and System Operator role authorization has been properly restricted

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

Fix this in Smart Software Manager On Prem Scoped from the published advisory
  • Consultation4.0 h
  • Implementation2.0 h
  • Testing4.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,120
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,392.

Scan for this in your stack

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dbcve dependency scanner

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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-2021-34766 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