Security readout for executives and security teams
Plain-English summary
This flaw affects Cisco Webex recording players for Windows. If a user is tricked into opening a malicious ARF or WRF recording file, attacker code could run as that user. The risk is meaningful for organizations that still allow these legacy recording players or receive Webex recording files by email or links.
Executive priority
Prioritize remediation where these players remain installed on user workstations, especially for staff likely to receive external meeting recordings. The issue requires user action but can lead to full code execution within the user’s privileges.
Technical view
CVE-2019-1924 is a CWE-119 memory-safety issue in Cisco Webex Network Recording Player and Cisco Webex Player for Windows. The software improperly validates ARF and WRF files. Exploitation is local and requires user interaction, but needs no privileges and can affect confidentiality, integrity, and availability.
Likely exposure
Exposure is most likely on Windows endpoints with Cisco Webex Network Recording Player, Cisco Webex Player, or Cisco WebEx WRF Player installed. The bundle does not provide affected version ranges, so inventory must be checked against Cisco guidance.
Exploitation context
The source describes phishing-style delivery through a link or email attachment and persuasion to open a malicious ARF or WRF file. The bundle does not show CISA KEV listing or cited evidence of active exploitation.
Researcher notes
Key constraints are user interaction and local file parsing. The provided evidence confirms ARF/WRF validation failure and arbitrary code execution impact, but does not include fixed versions, proof-of-concept details, or active exploitation evidence.
Mitigation direction
- Review Cisco advisory cisco-sa-20190807-webex-player for affected and fixed software guidance.
- Remove affected Webex recording players where business use is no longer required.
- Limit ARF and WRF attachments or downloads from untrusted sources where feasible.
- Warn users not to open unexpected Webex recording files from links or attachments.
Validation and detection
- Inventory Windows endpoints for Cisco Webex Network Recording Player and Webex Player installations.
- Compare installed player versions against Cisco advisory guidance.
- Check mail and web controls for handling of ARF and WRF files.
- Review endpoint telemetry for suspicious activity following recording file opens.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-119: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2019-1924 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
- High
- CVSS
- 7.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.8HighVector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20190807 Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution VulnerabilitiesCVE 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 Restriction of Operations within the Bounds of a Memory Buffer
Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.