CVE-2021-27426

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.21% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 67.8% 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

2022-03-23 19:46Z4 YR AGO

Last updated

2025-04-16 16:40Z1 YR AGO

Reserved

2021-02-19

Assigning CNA

icscert

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-453Insecure Default Variable InitializationVariant

Data version

5.1

Document digest

00870e91b10b82961643a3accf8558fff98b826a09f139db30e1e351eee86dd4

• www.cisa.govhttps://www.cisa.gov/uscert/ics/advisories/icsa-21-075-02x_refsource_CONFIRM
• www.gegridsolutions.comhttps://www.gegridsolutions.com/Passport/Login.aspxx_refsource_CONFIRM