Webex Meetings OnlineApplication · Cisco
CVE-2018-15420
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 · uneditedA vulnerability in the Cisco Webex Network Recording Player for Microsoft Windows and the Cisco Webex Player for Microsoft Windows could allow an attacker to execute arbitrary code on an affected system. The vulnerability exist because the affected software improperly validates Advanced Recording Format (ARF) and Webex Recording Format (WRF) files. An attacker could exploit this vulnerability by sending a user a malicious ARF or WRF file via a link or an email attachment and persuading the user to open the file by using the affected software. A successful exploit could allow the attacker to execute arbitrary code on the affected system.
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 confidenceThe Cisco Webex Network Recording Player and Webex Player for Windows improperly validate Advanced Recording Format (ARF) and Webex Recording Format (WRF) files, allowing attackers to craft malicious recording files that can execute arbitrary code when opened by a user.
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 Meetings OnlineApplication
< 1.3.37
Webex Meetings ServerApplication
= 2.5= 2.5.1.29= 2.6= 2.7= 2.7.1= 2.8
Webex Business Suite 32Application
< 32.15.30
Webex Business Suite 33Application
< 33.3CVSS 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
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/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 checksWork through these to decide whether this CVE applies to you.
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Identify installed Webex player softwareCheck Windows Programs and Features (appwiz.cpl) or the installation directory for Cisco Webex Network Recording Player or Webex Player for WindowsAffected if The software is present on the system
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Determine the exact version of Cisco Webex Meetings OnlineOpen Webex Meetings client, go to Help > About or check the version displayed in the applicationAffected if The version is less than 1.3.37
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Determine the exact version of Cisco Webex Meetings ServerCheck the Webex Meetings Server administration interface or check the installed package version on the serverAffected if The version matches exactly 2.5, 2.5.1.29, 2.6, 2.7, 2.7.1, or 2.8
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Determine the exact version of Cisco Webex Business Suite 32Check the Webex Business Suite version through the administration portal or the installed client versionAffected if The version is less than 32.15.30
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Determine the exact version of Cisco Webex Business Suite 33Check the Webex Business Suite version through the administration portal or the installed client versionAffected if The version is less than 33.3
The environment is affected if any Cisco Webex player software matching the product lines above is installed with a version that falls within the specified affected ranges.
Generated from the published advisory. Verify against your own configuration.
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.
From vendor data1.3.3732.15.3033.3
Apply vendor patches from Cisco for the Webex players; avoid opening untrusted ARF or WRF files from unknown sources.
Fix this in Webex Meetings Online
Scoped from the published advisory
- Consultation4.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
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
Free · runs locallyCheck whether your project pulls in CVE-2018-15420 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2018-15420 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- 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
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