CVE-2021-27453

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

1.04% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 64.0% 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

2021-12-21 17:55Z4 YR AGO

Last updated

2024-09-17 02:58Z2 YR AGO

Reserved

2021-02-19

Assigning CNA

icscert

Record state

PUBLISHED

Severity

High (CVSS 7.3)

CNA CVSS vector

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

Weaknesses

• CWE-288Authentication Bypass Using an Alternate Path or ChannelBase

Data version

5.1

Document digest

15038d16171b521e0937595ac55b821ea0e74b02c8d862dd3c0386e0698545ab

• us-cert.cisa.govhttps://us-cert.cisa.gov/ics/advisories/icsa-21-147-03x_refsource_CONFIRM