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.

Published 2026-08-13 · last modified 2026-08-24.

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.

EPSS exploit prediction

EPSS: 0.002 (6.2th percentile), scored 2026-09-27.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 6.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.000

Affected products

Lenovo System Update — versions 0

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

support.lenovo.com/us/en/product_security/LEN-213316 (vendor-advisory)
support.lenovo.com/us/en/solutions/ht037099 (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.