Strix
26.1K

CVE-2021-22816

HIGHCVSS 7.5/10EPSS 0.95%

Last modified

CVE-2021-22816 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.95% chance of exploitation in the next 30 days.

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

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
0.95%

56.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
Schneider-ElectricScadapack 312e Firmware< 8.19.1
Schneider-ElectricScadapack 313e Firmware< 8.19.1
Schneider-ElectricScadapack 314e Firmware< 8.19.1
Schneider-ElectricScadapack 330e Firmware< 8.19.1
Schneider-ElectricScadapack 333e Firmware< 8.19.1
Schneider-ElectricScadapack 334e Firmware< 8.19.1
Schneider-ElectricScadapack 337e Firmware< 8.19.1
Schneider-ElectricScadapack 350e Firmware< 8.19.1
Schneider-ElectricScadapack 357e Firmware< 8.19.1

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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. Affected Products: SCADAPack 312E, 313E, 314E, 330E, 333E, 334E, 337E, 350E and 357E RTUs with firmware V8.18.1 and prior
How severe is CVE-2021-22816?
CVE-2021-22816 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.95% probability of exploitation in the next 30 days.
How do I fix CVE-2021-22816?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-22816?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST