CVE-2021-3969

HIGHNVD 7.87.0▼

7.8

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.

CVSS v3: 7.8
EG Score: 7.0(medium)
EPSS: 62.1%
KEV: Not listed

Published

May 18, 2022

Last Modified

November 21, 2024

References (2)

psirt@lenovohttps://support.lenovo.com/us/en/product_security/LEN-75210
af854a3a-2127-422b-91ae-364da2661108https://support.lenovo.com/us/en/product_security/LEN-75210

Data Freshness Timeline

(refreshed 11× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 21:54 UTCEG score recompute
2026-05-25 21:54 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-3969?

CVE-2021-3969 is a high vulnerability published on May 18, 2022. 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.

When was CVE-2021-3969 disclosed?

CVE-2021-3969 was first published in the National Vulnerability Database on May 18, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-3969 actively exploited?

CVE-2021-3969 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 62.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-3969?

CVE-2021-3969 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 7.0.

How do I remediate CVE-2021-3969?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-3969, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-3969

Explore →

Is Your Infrastructure Affected by CVE-2021-3969?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2021-3969

📅 Published

🔄 Last Modified

🔗 References (2)