Webex Meetings OnlineApplication · Cisco
CVE-2018-0457
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 Player for Webex Recording Format (WRF) files could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. An attacker could exploit this vulnerability by sending a user a link or email attachment with a malicious WRF file and persuading the user to open the file in the Cisco Webex Player. A successful exploit could cause the affected player to crash, resulting in a DoS condition. For more information about this vulnerability, see the Details section of this security 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 · high confidenceA vulnerability in Cisco Webex Player allows an unauthenticated attacker to cause a denial of service by providing a malicious Webex Recording Format (WRF) file. When a user opens the crafted file, the player crashes. The attacker cannot force the file to open - they must rely on social engineering to persuade the user to open the attachment.
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
= t31= t32CVSS 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
- None
- Integrity
- None
- Availability
- High
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/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 checksWork through these to decide whether this CVE applies to you.
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Verify Cisco Webex Player installationCheck for Webex Player installation by looking in typical installation directories such as C:\Program Files\Cisco Systems\Webex\ or C:\Program Files (x86)\Cisco Systems\Webex\, or use system search to locate 'Webex Player.exe'Affected if Webex Player is not found on the system, the user is not affected by this specific vulnerability
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Identify installed Webex Player versionRight-click the Webex Player executable, select Properties, then navigate to the Details tab to view the Product Version, or open Webex Player and check Help > AboutAffected if The installed version is t31 or t32, the user is likely affected by this vulnerability
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Confirm WRF file associationVerify that .wrf files are associated with Webex Player by checking file type associations in Windows Settings > Apps > Default apps, or by attempting to open a WRF file with Webex PlayerAffected if WRF files open automatically in Webex Player, indicating the vulnerable component is active
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Review recent WRF file handling activityCheck email logs, downloaded files folder, or endpoint detection logs for any recently opened .wrf files from untrusted or unknown sourcesAffected if A malicious WRF file was recently opened with Webex Player, the system has likely experienced the denial of service condition
A user is affected if Cisco Webex Player version t31 or t32 is installed and the player can open WRF files, as the denial of service triggers upon opening a crafted malicious WRF file
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 dataOrganizations should deploy available Cisco patches when released, implement email/attachment filtering for .wrf files from untrusted sources, and train users not to open unexpected attachments. Until a patch is available, consider blocking or quarantining WRF file attachments at the email gateway.
Fix this in Webex Meetings Online
Scoped from the published advisory
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-0457 — 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-2018-0457 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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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.
- 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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