CVE-2026-77882

HIGH 7.8

CVSS Score

7.8

EPSS Score

0.0%

EPSS Percentile

0th

A deserialization of untrusted data vulnerability was discovered in Lenovo System Update that could allow a local authenticated user to execute code with elevated privileges.

CWE	CWE-502
Vendor	lenovo
Product	system update
Published	Nov 11, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Lenovo / System Update

0 ≤ 5.08.03.59

References

NVD ↗ CVE.org ↗ EPSS Data ↗

support.lenovo.com: https://support.lenovo.com/us/en/product_security/LEN-232748 support.lenovo.com: https://support.lenovo.com/us/en/downloads/ds012808

Credits

Lenovo thanks Alexander Wolf for reporting this vulnerability. Lenovo thanks Nicholas Ineson – Forefront IT Security Services Ltd for subsequently reporting this vulnerability.