CVE-2021-3948

mediumpriority · track · 25OT risk · elevatedEPSS 0.006 · 47 %ileEUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.56% (47th) EPSS
CVSS 6.5 · medium
Is it mine?
20 products
Check your exposure
Who says so?
4 sources
cnnvd · enisa_euvd · nvd · redhat_csaf

EPSS · scored 2026-10-27

An incorrect default permissions vulnerability was found in the mig-controller. Due to an incorrect cluster namespaces handling an attacker may be able to migrate a malicious workload to the target cluster, impacting confidentiality, integrity, and availability of the services located on that cluster.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • Fixedrhmtc/openshift-migration-controller-rhel8@sha256:9b370e4581d8304b22a7ed0d611dfd8cda5de9409de317a2d14493b8a85d1825_amd64 as a component of 8Base-RHMTC-1.5redhat_csaf

    For details on how to install and use MTC, refer to: https://docs.openshift.com/container-platform/latest/migration_toolkit_for_containers/installing-mtc.html

    https://access.redhat.com/errata/RHSA-2021:4848
  • Fixedrhmtc/openshift-migration-controller-rhel8@sha256:112ecc3cc6075008cab440b8d70d8874049c660b79911cff4060e9c948c1d55e_amd64 as a component of 8Base-RHMTC-1.6redhat_csaf

    For details on how to install and use MTC, refer to: https://docs.openshift.com/container-platform/latest/migration_toolkit_for_containers/installing-mtc.html

    https://access.redhat.com/errata/RHSA-2022:0202
02

cvss

Technical severity, 0–10. One row per scoring source.

6.5
010

base score 0–10 · higher = more severe · hover a vector to decode

v2.06.5mediumAV:N/AC:L/Au:S/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8 · impact 6.4
v3.16.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:Lprimary · NVD / NIST USexploitability 2.8 · impact 3.4
v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:Usecondary · CVSS-BT (t0sche)
v3.16.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:Lsecondary · Red Hat Product Security US
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-276USprimaryCWE-276US
04

affected products (20)

Products and version ranges known to be affected.

05

advisories (2)

Vendor and ecosystem advisories describing this.

  • RHSA-2021:4848Red Hat Security Advisory: Migration Toolkit for Containers (MTC) 1.5.2 security update and bugfix advisory2021-11-29csaf · redhat_csafUS

    The Migration Toolkit for Containers (MTC) 1.5.2 is now available. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

  • RHSA-2022:0202Red Hat Security Advisory: Migration Toolkit for Containers (MTC) 1.6.3 security and bug fix update2022-01-20csaf · redhat_csafUS

    The Migration Toolkit for Containers (MTC) 1.6.3 is now available. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

06

also known as (3)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdnvdredhat_csafNVDCVE.orgMITRE
published 2022-02-18modified 2026-06-17
09

references (6)

External citations — patches, advisories, analysis.

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