CVE-2021-22816
A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists that could...
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
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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
- Record
CVE-2021-22816- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 7.8 High
AV:N/AC:L/Au:N/C:N/I:N/A:C - Weakness
- CWE-754
- Updated
- 2026-11-02
CVE List No score
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
- Record
CVE-2021-22816- Updated
- 2026-11-02
EUVDEUVD-2021-9951 No score
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
- Record
EUVD-2021-9951- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-x4x8-fc23-7gg9 No score
A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists that could...
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
- Record
GHSA-x4x8-fc23-7gg9- Weakness
- CWE-754
- Updated
- 2026-11-02
Affected products
- schneider-electric scadapack 312e firmware
- schneider-electric scadapack 313e firmware
- schneider-electric scadapack 314e firmware
- schneider-electric scadapack 330e firmware
- schneider-electric scadapack 333e firmware
- schneider-electric scadapack 334e firmware
- schneider-electric scadapack 337e firmware
- schneider-electric scadapack 350e firmware
- schneider-electric scadapack 357e firmware
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-22816 is a high vulnerability (CVSS 7.5) in Schneider-electric Scadapack 312e Firmware, published January 28, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.95%, the 61st percentile. No source names a fixed version.