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Webex TeamsApplication · Cisco

CVE-2022-20863

MEDIUM · 5.3 CVSS v3.1 Published 2022-09-08
Fix available
A fix is available. Upgrade to 42.7 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
A vulnerability in the messaging interface of Cisco Webex App, formerly Webex Teams, could allow an unauthenticated, remote attacker to manipulate links or other content within the messaging interface. This vulnerability exists because the affected software does not properly handle character rendering. An attacker could exploit this vulnerability by sending messages within the application interface. A successful exploit could allow the attacker to modify the display of links or other content within the interface, potentially allowing the attacker to conduct phishing or spoofing attacks.

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 is a character rendering/spoofing vulnerability in Cisco Webex App's messaging interface. An unauthenticated remote attacker can send specially crafted messages containing manipulated characters that alter how links and content are displayed to users. The vulnerability stems from improper handling of character rendering, allowing attackers to conduct phishing or spoofing attacks by making malicious links appear legitimate.

MitigationApply vendor-supplied patches or software updates from Cisco for the Webex App. Users should be cautious of unexpected or suspicious messages containing unusual characters in links.

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
Webex TeamsApplication
Affected:< 42.7

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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. Check installed Cisco Webex App version
    Open the Cisco Webex App, click on your profile picture or avatar, then navigate to Help > About Cisco Webex App to view the current software version number.
    Affected if The displayed version number is less than 42.7 (for example, 42.6, 42.5, or earlier)
  2. Verify Webex Teams client version via system settings
    On Windows, open Apps & Features or Programs and Features and locate Cisco Webex Teams or Cisco Webex Meetings Suite to confirm the installed version. On macOS, open System Preferences > Webex and check the version information.
    Affected if The listed version is < 42.7
  3. Confirm messaging functionality is active
    The vulnerability affects message rendering in the Webex messaging interface. Check that you can access the Webex messaging or teams feature within the application.
    Affected if Messaging features are accessible and the application displays messages (this is the default state for affected versions)
  4. Review recent Webex meeting or message windows
    Examine any received messages for unusual character display issues, particularly in links or URLs that may appear visually distorted or different from their actual destination.
    Affected if You observe links or content with manipulated characters that display differently than expected (note: this is an optional visual confirmation step)

You are affected if the installed Cisco Webex App or Cisco Webex Teams version is below 42.7 and you use the messaging functionality.

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 42.7 or later
Fixed in 42.7
Interim mitigation

Apply vendor-supplied patches or software updates from Cisco for the Webex App. Users should be cautious of unexpected or suspicious messages containing unusual characters in links.

Recommended fix High confidence

Version 42.7 or later

  1. 1. Open the Webex App desktop client or mobile app
  2. 2. Navigate to the settings or profile section
  3. 3. Check the current version number under 'About' or 'Version' information
  4. 4. If the version is below 42.7, download and install the latest version of Cisco Webex App from the official Cisco download page or use the built-in update mechanism
  5. 5. Verify the installation completed successfully and confirm the version is now 42.7 or later

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

Fix this in Webex Teams Scoped from the published advisory
  • Consultation4.0 h
  • Implementation16.0 h
  • Testing8.0 h
  • Review / QA4.0 h
32.0 hours of engineering $5,600
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,960.

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-2022-20863 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