CVE-2026-77882 · Vendor
NO FIX YET
Lenovo System Update deserializes untrusted data without checking it. A local authenticated user can run code with elevated privileges.
first public Nov 11, 2026 · 2 sources
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Machines running Lenovo System Update, where a local user with an account can trigger the flaw. The sources do not give the affected version range, so teams should check their Lenovo fleet against Lenovo's advisory.
Not affected if no-lenovo-system-update-installed
Who cares lenovo, lenovo-system-update, windows
5.08.04.85, but it is not confirmed to contain a fix for this CVENo fix yet, per the sources.
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.
This page as .md · .json · CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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