CVE-2026-47830 Incorrect Permission Assignment Allows Local Privilege Escalation to SYSTEM via Executable Overwrite
Local attackers can overwrite executables to gain SYSTEM privileges on Windows stemcells, requiring an upgrade to the builder tool.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-47830?
CVE-2026-47830 is a high-severity vulnerability in Cloud Foundry Foundation bosh-windows-stemcell-builder, published on 9 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Incorrect Permission Assignment in BOSH.Utils.psm1 in BOSH-Ecosystem bosh-windows-stemcell-builder allows low-privilege authenticated users to overwrite C:\bosh\service_wrapper.exe or C:\bosh\bosh-agent.exe and gain NT AUTHORITY\SYSTEM on the next service restart or reboot. This can lead to full host control. Affected versions: bosh-windows-stemcell-builder versions prior to v2019.98.
Which versions are affected by CVE-2026-47830?
How do I fix CVE-2026-47830?
No fix has been published for CVE-2026-47830 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-47830 being exploited?
There is no known exploitation of CVE-2026-47830 in the wild and no public exploit code.
Sources
Also known as GHSA-v8gm-j274-p577.