CVE-2021-27565

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

2.59% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 83.9% 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:N/I:N/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

2021-08-19 11:04Z5 YR AGO

Last updated

2024-08-03 21:26Z2 YR AGO

Reserved

2021-02-22

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')Base

Data version

5.1

Document digest

56944c79781404c6df51be04a4cbd9a11220a23c6856370a44f19fb8ec47ff0e

• www.hcc-embedded.comhttps://www.hcc-embedded.com/x_refsource_MISC
• www.hcc-embedded.comhttps://www.hcc-embedded.com/about/about-internichex_refsource_MISC
• www.forescout.comhttps://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/x_refsource_MISC
• www.kb.cert.orgVU#608209https://www.kb.cert.org/vuls/id/608209third-party-advisoryx_refsource_CERT-VN