What is CVE-2026-6387?

CVE-2026-6387 is a high-severity vulnerability in Lenovo System Update, classified under Authentication Bypass by Spoofing. CVSS score: 7.0/10. Published 2026-08-13.

How severe is CVE-2026-6387?

High severity. CVSS v3 base score is 7.0 out of 10.

Vulnerability in Lenovo System Update

CVE-2026-6387

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.

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Lenovo System Update — versions 0

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

psirt@lenovo.com (vendor-advisory)
psirt@lenovo.com (product, patch)

Frequently asked questions

What is CVE-2026-6387?: CVE-2026-6387 is a high-severity vulnerability in Lenovo System Update, classified under Authentication Bypass by Spoofing. CVSS score: 7.0/10. Published 2026-08-13.
How severe is CVE-2026-6387?: High severity. CVSS v3 base score is 7.0 out of 10.