CVE-2026-50544
MEDIUMDescription
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`.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
Exploit Intelligence
Low risk: more likely to be exploited than 0% of all known CVEs.
References
Related Vulnerabilities
Other CWE-379 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2020-11979 | High | 7.5 | 8.2% | - | Fix |
| CVE-2020-27216 | High | 7.0 | 4.4% | - | Fix |
| CVE-2023-26396 | High | 7.8 | 4.0% | - | - |
| CVE-2016-9486 | High | 7.8 | 3.5% | - | - |
| CVE-2024-36821 | Medium | 6.8 | 2.9% | - | - |
| CVE-2021-21290 | Medium | 6.2 | 1.8% | - | Fix |
Common questions
How do I fix CVE-2026-50544?
No published fix for CVE-2026-50544 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-50544 being actively exploited?
Not that we know of. CVE-2026-50544 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.09% is the estimated probability that it will be exploited in the next 30 days. That is higher than 0% of all scored CVEs.
How severe is CVE-2026-50544?
CVE-2026-50544 has a CVSS v3 base score of 6.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-14.