Incorrect permission assignment in NortheBridge luminalshine
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- Required
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
NortheBridge/luminalshine is a Sunshine-compatible game stream host for Moonlight. Prior to version 26.05.0-rc4, a latent gap exists on a default install, the file at `src/platform/windows/misc.cpp` lives at `C:\ProgramData\LuminalShine\config\apps.json` and is created by the `SYSTEM` service. Under Windows' default `C:\ProgramData` inheritance, that gives `BUILTIN\Users` only Read+Execute — not writable — so the canonical EoP doesn't actually trigger on a vanilla install. Version 26.05.0-rc4 contains a patch for the issue. As a workaround, use default condition DACLs for `ProgramData`.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| NortheBridge | luminalshine | before 26.05.0-rc4 | 26.05.0-rc4 | Patch available | CNA |
- luminalshine VendorNortheBridge Affected before 26.05.0-rc4 Fixed in 26.05.0-rc4 Patch available CNA
Remediation
- Fix · CNA luminalshine (NortheBridge) Fixed in 26.05.0-rc4
Timeline
- 2026-10-02 Threatist record created from CVE-2026-50544
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences