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CVE-2021-3922· NVD / CVE Program· CNA lenovo

A race condition vulnerability was reported in IMController, a software component of Lenovo System Interface Foundation, prior to version 1.

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.

HighCVSS 7.0 · v3.1—No exploit No fix recorded

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Published
May 18, 2022
Updated
Jun 17, 2026
EPSS
1.9% · 79th percentile
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Report tools

JSON

Action score

29

Monitor

Low priority for now.

CVSS
28 / 40 · 7.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 1.9%

CNA vs NVD score

NVD
7.0
CNA · lenovo
7.8
0.8 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
lenovosystem interface foundation

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • lenovo system interface foundationbefore 1.1.20.3

Versions reported by the vendor

Affected version ranges reported by the assigning authority (lenovo). Independent of NVD's CPE analysis and usually ahead of it.

  • Lenovo IMController

    • unspecified and later · before 1.1.20.3affected

Same product

lenovo: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-6186A potential vulnerability was reported in Lenovo System Interface Foundation versions before v1.1.18.3 that could allow an authenticated use
    35Monitor
  • CVE-2020-8319A privilege escalation vulnerability was reported in Lenovo System Interface Foundation prior to version 1.1.19.3 that could allow an authen
    31Monitor
  • CVE-2020-8318A privilege escalation vulnerability was reported in the LenovoSystemUpdatePlugin for Lenovo System Interface Foundation prior to version th
    31Monitor
  • CVE-2019-6189A potential vulnerability was reported in Lenovo System Interface Foundation versions before v1.1.18.3 that could allow an administrative us
    31Monitor
  • CVE-2016-8223During an internal security review, Lenovo identified a local privilege escalation vulnerability in Lenovo System Interface Foundation softw
    31Monitor
  • CVE-2021-3969A Time of Check Time of Use (TOCTOU) vulnerability was reported in IMController, a software component of Lenovo System Interface Foundation,
    29Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records