Security readout for executives and security teams
Plain-English summary
CVE-2020-27384 is a local privilege escalation issue in the Guild Wars 2 launcher. The source says the installation directory was writable by Everyone, allowing an authenticated Windows user to replace the launcher executable with another binary. This matters mainly on endpoints where the affected game client is installed.
Executive priority
Treat as endpoint hygiene priority, especially on shared or managed Windows systems. It is not evidenced as actively exploited, but world-writable executable paths can undermine local security controls.
Technical view
The reported issue affects Gw2-64.exe in Guild Wars 2 launcher version 106916. The described root cause is improper filesystem permissions: the Guild Wars 2 directory and contents grant Full Control to the Everyone group. An authenticated local user could modify the existing executable.
Likely exposure
Likely limited to Windows endpoints with Guild Wars 2 launcher version 106916 or similarly permissioned installations. The source bundle does not identify enterprise server exposure, remote attack surface, CPEs, or fixed versions.
Exploitation context
The CVE is not listed as KEV, and the provided sources do not state active exploitation. The described attacker position is authenticated local user access, not unauthenticated remote access.
Researcher notes
The public record lacks CVSS, CWE, CPE, vendor fix details, and exploit-in-the-wild evidence. Analysis should remain constrained to the reported launcher version and filesystem permission weakness unless additional vendor data is obtained.
Mitigation direction
- Check ArenaNet or Guild Wars 2 vendor guidance for fixed launcher versions.
- Update or reinstall the launcher from trusted official sources.
- Remove Full Control for Everyone from the installation directory.
- Limit game installations on managed business endpoints.
- Monitor for unexpected changes to Gw2-64.exe.
Validation and detection
- Inventory endpoints for Guild Wars 2 launcher installations.
- Confirm whether Gw2-64.exe matches launcher version 106916.
- Inspect directory permissions for Everyone Full Control.
- Verify standard users cannot modify launcher files.
- Review endpoint telemetry for launcher binary changes.
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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CVE-2020-27384 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/FreySolarEye/CVE/blob/master/Guild%20Wars%202%20-%20Local%20Privilege%20EscalationCVE reference · x_refsource_MISC
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.