CVE-2026-6387 Auth bypass in System Update
A local authenticated user can bypass authentication in Lenovo System Update to execute arbitrary code with elevated privileges.
- 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-2026-6387?
CVE-2026-6387 is a high-severity authentication bypass vulnerability in Lenovo System Update, published on 13 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A potential authentication bypass vulnerability was reported in Lenovo System Update that could allow a local authenticated user to execute arbitrary code with elevated privileges.
Weakness: CWE-290
Which versions are affected by CVE-2026-6387?
How do I fix CVE-2026-6387?
No fix has been published for CVE-2026-6387 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-6387 being exploited?
There is no known exploitation of CVE-2026-6387 in the wild and no public exploit code.
Sources
Also known as GHSA-5j74-5rwg-pcwv.