Security readout for executives and security teams
Plain-English summary
This issue can make the Webex recording player crash if a user opens a specially crafted Webex recording file. The supplied sources do not indicate data theft or system compromise. Business impact is limited to disruption of the local player, but phishing-style delivery is plausible because the attacker must persuade a user to open the file.
Executive priority
Treat this as routine endpoint hygiene, not an emergency. Prioritize updates or removal where the legacy player remains installed, especially for users who regularly receive external recordings. The likely business risk is localized disruption and support burden rather than data breach.
Technical view
Insufficient validation of elements inside ARF or WRF Webex recordings in Cisco Webex Network Recording Player and Webex Player for Windows can crash the player process. The CVSS 3.1 vector is local, low complexity, no privileges, user interaction required, and availability-only impact. Releases earlier than 3.0 MR3 Security Patch 2 and 4.0 MR3 are affected.
Likely exposure
Exposure is limited to Windows endpoints with Cisco Webex Network Recording Player or Cisco Webex Player installed at affected versions. Organizations that no longer use local ARF or WRF playback likely have little exposure. Server-side Webex services are not identified as affected in the provided sources.
Exploitation context
The source bundle describes social delivery: a malicious ARF or WRF file sent by link or attachment and opened locally. KEV is false, and no provided source claims active exploitation. The expected result is a crash of the player application, not broader host compromise.
Researcher notes
The weakness is CWE-20 input validation in parsing Webex recording elements. The attack requires local file handling and user interaction. The provided evidence names availability impact only and does not support claims of code execution, privilege escalation, confidentiality impact, or active exploitation.
Mitigation direction
- Update affected players to Cisco fixed releases or later.
- Check Cisco guidance for the exact supported update path.
- Remove the player from endpoints that no longer need ARF or WRF playback.
- Warn users not to open unexpected Webex recording files or links.
- Prefer trusted distribution channels for legitimate recordings.
Validation and detection
- Inventory Windows endpoints for Webex Network Recording Player and Webex Player.
- Confirm installed versions are not earlier than the fixed releases.
- Review helpdesk reports for recurring Webex player crashes after opening recordings.
- Verify email controls flag unexpected ARF and WRF attachments.
- Document whether local ARF or WRF playback is still required.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-20: Exact CWE lookup
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Open ATT&CK lookupCVE-2020-3319 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Low
- CVSS
- 3.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L1.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
3.3LowVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
- Cisco Webex Network Recording Player and Cisco Webex Player Denial of Service VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.