CVE-2021-27656

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

1.20% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 66.1% of scored records. A rank, not a probability.

NVD base score

7.5 (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:N/A:N

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

2021-03-18 17:58Z5 YR AGO

Last updated

2024-09-17 03:23Z1 YR AGO

Reserved

2021-02-24

Assigning CNA

jci

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

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

Weaknesses

• CWE-862Missing AuthorizationClass

Data version

5.1

Document digest

5a9c433d6ce79df610f2961eaa5b6dccf9ef39a509b077a106e760fcd8a0e3fd

• www.johnsoncontrols.comhttps://www.johnsoncontrols.com/cyber-solutions/security-advisoriesx_refsource_CONFIRM
• us-cert.cisa.govICS-CERT Advisoryhttps://us-cert.cisa.gov/ics/advisories/icsa-21-077-01third-party-advisoryx_refsource_CERT