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Telepresence Video Communication ServerApplication · Cisco

CVE-2022-20806

HIGH · 7.1 CVSS v3.1 Published 2022-05-27
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
77/100
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 to write files or disclose sensitive information on an affected device. 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 the API and web-based management interfaces of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) allow an authenticated, remote attacker to write arbitrary files to the device filesystem or disclose sensitive information. The vulnerabilities stem from insufficient validation of user inputs in the management interfaces.

MitigationApply Cisco-provided patches for Expressway Series and VCS devices. Restrict access to management interfaces to trusted networks or use VPN. Ensure strong authentication is enforced for management access.

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:<= x14.0.7

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
Low
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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 the product
    Check if the system is Cisco Expressway Series or Cisco TelePresence Video Communication Server (VCS). Access the web管理界面 or use CLI command 'xStatus' to confirm the product name.
    Affected if The device is not Cisco Expressway Series or Cisco TelePresence VCS, this CVE does not apply.
  2. Check the installed version
    Log into the web管理界面 and navigate to 'System' > 'Product ID' or use CLI command 'version' to retrieve the software version. Compare against the affected range: Cisco Telepresence VCS <= x14.0.7.
    Affected if The installed version is x14.0.7 or lower for VCS, or falls within any unpatched Expressway Series version in that range.
  3. Verify management interface is enabled
    Check via web UI at 'System' > 'Administration' > 'HTTP/HTTPS service settings' or use CLI command 'xConfiguration HTTP Proxy' to confirm the web-based management interface is turned on.
    Affected if The web management interface is disabled; the attack surface is reduced but the vulnerability still exists in the software if a future enablement occurs.
  4. Confirm management access is not restricted
    Review network access controls at 'System' > 'Administration' > 'Access' > 'IP address restriction' or check firewall rules to see if management interface is exposed to untrusted networks.
    Affected if Management interface is reachable from untrusted networks (such as the internet) without VPN or IP restrictions, increasing exploitability.

You are affected if you run Cisco Expressway Series or VCS with version <= x14.0.7 and have the web management interface enabled and accessible, even internally.

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
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply Cisco-provided patches for Expressway Series and VCS devices. Restrict access to management interfaces to trusted networks or use VPN. Ensure strong authentication is enforced for management access.

Recommended fix Moderate confidence

Cisco TelePresence VCS x14.0.8 or later

  1. 1. Back up the current VCS configuration and any critical data
  2. 2. Review Cisco release notes for the x14.0.8 or later release for any pre-upgrade requirements
  3. 3. Download the Cisco TelePresence Video Communication Server x14.0.8 or later from Cisco (requires valid CCO account)
  4. 4. Access the VCS admin interface and navigate to Maintenance > Upgrade
  5. 5. Upload and apply the upgrade package
  6. 6. Verify the upgrade was successful and confirm the new version number
  7. 7. Test that all services and interfaces are functioning properly
Caveat Review release notes for any configuration or feature changes between your current version and the upgrade version

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
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
13.0 hours of engineering $2,330
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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-2022-20806 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