CVE-2021-22816

HIGH
7.5
CVSS Score
Published: January 28, 2022 at 07:09 PM UTC
Updated: June 17, 2026 at 03:37 AM UTC
18 products affected across 1 vendorScadapack 333E FirmwareScadapack 350E FirmwareScadapack 357E Firmware

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Severity
HIGH7.5
Exploit prediction
EPSS 0.9%

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 is configured as a Modbus server. Affected Products: SCADAPack 312E, 313E, 314E, 330E, 333E, 334E, 337E, 350E and 357E RTUs with firmware V8.18.1 and prior

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 8.19.1
Affected range stops below 8.19.1, so it looks safe — our inference, not a vendor statement
schneider-electric-scadapack-312e (same device)
v < 8.19.1
Affected range stops below 8.19.1, so it looks safe — our inference, not a vendor statement
schneider-electric-scadapack-313e (same device)
v < 8.19.1
Affected range stops below 8.19.1, so it looks safe — our inference, not a vendor statement
schneider-electric-scadapack-314e (same device)
v < 8.19.1
Affected range stops below 8.19.1, so it looks safe — our inference, not a vendor statement
schneider-electric-scadapack-330e (same device)
v < 8.19.1
Affected range stops below 8.19.1, so it looks safe — our inference, not a vendor statement
schneider-electric-scadapack-333e (same device)
v < 8.19.1
Affected range stops below 8.19.1, so it looks safe — our inference, not a vendor statement
schneider-electric-scadapack-334e (same device)
v < 8.19.1
Affected range stops below 8.19.1, so it looks safe — our inference, not a vendor statement
schneider-electric-scadapack-337e (same device)
v < 8.19.1
Affected range stops below 8.19.1, so it looks safe — our inference, not a vendor statement
schneider-electric-scadapack-350e (same device)
v < 8.19.1
Affected range stops below 8.19.1, so it looks safe — our inference, not a vendor statement
schneider-electric-scadapack-357e (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-754

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