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Telepresence Video Communication ServerApplication · Cisco

CVE-2022-20755

HIGH · 7.2 CVSS v3.1 Published 2022-04-06
Fix available
A fix is available. Upgrade to 14.0.5 or later.
See remediation →
78/100
Remediation priority · High
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
Multiple vulnerabilities in the API and web-based management interfaces of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an authenticated, remote attacker with read/write privileges to the application to write files or execute arbitrary code on the underlying operating system of an affected device as the root user. For more information about these vulnerabilities, see the Details section of this advisory.

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

Multiple vulnerabilities in Cisco Expressway Series and TelePresence VCS web management and API interfaces allow an authenticated attacker with read/write privileges to write files or execute arbitrary code as root on the underlying operating system.

MitigationApply Cisco security updates for Expressway Series and TelePresence VCS. Restrict access to management interfaces to trusted networks and enforce strong credential policies to reduce attack surface.

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
Telepresence Video Communication ServerApplication
Affected:< 14.0.5

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

CVSS:3.1/AV:N/AC:L/PR:H/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 Cisco TelePresence VCS or Expressway installation
    Locate the Cisco TelePresence Video Communication Server or Expressway Series software on the system. Common installation paths include /opt/tandberg/ or check for processes named 'xconf', 'xserver', or 'tandberg' running on the host.
    Affected if The software is present on the system.
  2. Determine installed version of TelePresence VCS or Expressway
    Run the command 'xcommand SystemUnitSoftwareVersion' via the CLI or API, or access the web interface and navigate to System > System Information to view the software version. Alternatively, check the version file in /tandberg/version or use 'show version' in the CLI.
    Affected if The installed version is below 14.0.5.
  3. Verify web management interface status
    Check if the web management interface (HTTP/HTTPS on ports 80/443 or 8443) is enabled and listening. Run 'netstat -tulpn | grep -E "(80|443|8443)"' or check via CLI with 'xstatus WebEngine.'
    Affected if The web management interface is enabled and accessible.
  4. Check API interface accessibility
    Verify if the API endpoint is accessible by testing connectivity to the API port (typically 443). Check configuration in the web interface under Configuration > API or via CLI command 'xconfiguration API' to confirm API settings.
    Affected if API interfaces are enabled and exposed.

The environment is affected if Cisco TelePresence VCS or Expressway Series version is below 14.0.5 AND either the web management interface or API interface is enabled and accessible.

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 14.0.5 or later
Fixed in 14.0.5
Interim mitigation

Apply Cisco security updates for Expressway Series and TelePresence VCS. Restrict access to management interfaces to trusted networks and enforce strong credential policies to reduce attack surface.

Recommended fix High confidence

Version 14.0.5 or later

  1. 1. Obtain the Cisco TelePresence Video Communication Server version 14.0.5 or later software from Cisco's official download site (tools.cisco.com) using valid credentials
  2. 2. Log in to the VCS web-based management interface as an administrator
  3. 3. Navigate to Maintenance > Upgrade option in the web interface
  4. 4. Upload the upgrade file (.tar or .iso as provided by Cisco)
  5. 5. Follow the on-screen prompts to install the upgrade
  6. 6. After installation, verify the new version by checking System > Information in the web interface
  7. 7. Verify that the vulnerabilities are remediated by confirming the version shows 14.0.5 or later
  8. 8. Review Cisco release notes for any post-upgrade configuration requirements
Caveat Review Cisco release notes for any configuration changes required after upgrading; test in non-production environment first if possible

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

Fix this in Telepresence Video Communication Server Scoped from the published advisory
  • Consultation4.0 h
  • Implementation2.0 h
  • Testing6.0 h
  • Review / QA3.0 h
15.0 hours of engineering $2,600
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,160.

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-2022-20755 in production — separate from our analysis above.

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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