CVE-2021-3969

Severity: high (CVSS 7.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-05-18 · updated 2026-06-17
Weakness: CWE-367

Description

A Time of Check Time of Use (TOCTOU) vulnerability was reported in IMController, a software component of Lenovo System Interface Foundation, prior to version 1.1.20.3that could allow a local attacker to elevate privileges.

Affected products

Lenovo System Interface Foundation: before 1.1.20.3 — fixed in 1.1.20.3

How to fix

Upgrade to a fixed version: Lenovo System Interface Foundation 1.1.20.3. Check the vendor advisory for mitigations.

References

https://support.lenovo.com/us/en/product_security/LEN-75210
https://support.lenovo.com/us/en/product_security/LEN-75210

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