What is CVE-2021-3922?

CVE-2021-3922 is a high-severity vulnerability in Lenovo Imcontroller, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.8/10. Published 2022-05-18.

How severe is CVE-2021-3922?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Lenovo Imcontroller

CVE-2021-3922

A race condition vulnerability was reported in IMController, a software component of Lenovo System Interface Foundation, prior to version 1.1.20.3 that could allow a local attacker to connect and interact with the IMController child process' named pipe.

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

Published 2022-05-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.019 (79.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 79.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: +0.000

Affected products

Lenovo Imcontroller — versions unspecified
Lenovo System Interface Foundation

Weakness classification (CWE)

References

support.lenovo.com/us/en/product_security/LEN-75210 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-3922?: CVE-2021-3922 is a high-severity vulnerability in Lenovo Imcontroller, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.8/10. Published 2022-05-18.
How severe is CVE-2021-3922?: High severity. CVSS v3 base score is 7.8 out of 10.