synced 11 MIN AGO
01 Record

CVE-2021-22816

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists that could cause a Denial of Service of the RTU when receiving a specially crafted request over Modbus, and the RTU

UnratedPUBLISHEDCNA: schneider
CNA base scoreUnratedNo CNA CVSS vector

02 Description

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists that could cause a Denial of Service of the RTU when receiving a specially crafted request over Modbus, and the RTU

03 Exploitation and scoring

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
0.94% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 60.8% 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.

04 Metadata

Published
2022-01-28 19:09Z4 YR AGO
Last updated
2024-08-03 18:51Z2 YR AGO
Reserved
2021-01-06
Assigning CNA
schneider
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
  • CWE-754Improper Check for Unusual or Exceptional ConditionsClass
Data version
5.1
Document digest
cf458621e12f7a591752a3a07590924106b36db456de45bb588ad00d7bd98e0e

05 Affected products

VendorProductVersionsPlatforms
schneider-electricscadapack_312eNot specified—
schneider-electricscadapack_312e_firmwareNot specified—
schneider-electricscadapack_313eNot specified—
schneider-electricscadapack_313e_firmwareNot specified—
schneider-electricscadapack_314eNot specified—
schneider-electricscadapack_314e_firmwareNot specified—
schneider-electricscadapack_330eNot specified—
schneider-electricscadapack_330e_firmwareNot specified—
schneider-electricscadapack_333eNot specified—
schneider-electricscadapack_333e_firmwareNot specified—
schneider-electricscadapack_334eNot specified—
schneider-electricscadapack_334e_firmwareNot specified—
schneider-electricscadapack_337eNot specified—
schneider-electricscadapack_337e_firmwareNot specified—
schneider-electricscadapack_350eNot specified—
schneider-electricscadapack_350e_firmwareNot specified—
schneider-electricscadapack_357eNot specified—
schneider-electricscadapack_357e_firmwareNot specified—

06 References