CVE-2021-22643

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

2.08% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 79.8% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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

2021-02-23 03:13Z5 YR AGO

Last updated

2024-08-03 18:44Z2 YR AGO

Reserved

2021-01-05

Assigning CNA

icscert

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-125Out-of-bounds ReadBase

Data version

5.1

Document digest

1251d0efe9df7d212777e59729988252def7e42b440c8fd0568b84d2bf008c85

• us-cert.cisa.govhttps://us-cert.cisa.gov/ics/advisories/icsa-21-035-01x_refsource_MISC
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-231216.pdfx_refsource_CONFIRM
• www.zerodayinitiative.comhttps://www.zerodayinitiative.com/advisories/ZDI-21-319/x_refsource_MISC
• www.zerodayinitiative.comhttps://www.zerodayinitiative.com/advisories/ZDI-21-316/x_refsource_MISC