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 is configured as a Modbus server.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.95%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.95% probability · 59th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-754
- Affected
- 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
- Source
- cybersecurity@se.com
References
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.