CVE-2021-27664

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

1.60% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 73.6% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-10-11 15:21Z4 YR AGO

Last updated

2024-09-17 03:55Z1 YR AGO

Reserved

2021-02-24

Assigning CNA

jci

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

• CWE-269Improper Privilege ManagementClass

Data version

5.1

Document digest

da7c15f9cfeb3566aed737bfd34bfbf8906ffb39f3737e3e5f053ce0458a7d5c

• www.johnsoncontrols.comhttps://www.johnsoncontrols.com/cyber-solutions/security-advisoriesx_refsource_CONFIRM
• us-cert.govICS-CERT Advisoryhttps://us-cert.gov/ics/advisories/icsa-21-280-01third-party-advisoryx_refsource_CERT