CVE-2021-40356

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

Ranks above 61.7% 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

2021-09-14 10:48Z4 YR AGO

Last updated

2024-08-04 02:44Z2 YR AGO

Reserved

2021-09-01

Assigning CNA

siemens

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-611Improper Restriction of XML External Entity ReferenceBase

Data version

5.1

Document digest

cdedfdb500608a02d0e522a92c034b499e1258aad626c14a08436ac15758cab7

• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-987403.pdfx_refsource_MISC