Strix
26.1K

CVE-2021-22779

CRITICALCVSS 9.1/10EPSS 1.01%

Last modified

CVE-2021-22779 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. Authentication Bypass by Spoofing vulnerability exists in EcoStruxure Control Expert (all versions prior to V15.0 SP1, including all versions of Unity Pro), EcoStruxure Control Expert V15.0 SP1, EcoStruxure Process Expert (all versions, including all versions of EcoStruxure Hybrid DCS), SCADAPack RemoteConnect for x70 (all versions), Modicon M580 CPU (all versions - part numbers BMEP* and BMEH*), Modicon M340 CPU (all versions - part numbers BMXP34*), that could cause unauthorized access in read and write mode to the controller by spoofing the Modbus communication between the engineering software and the controller.. EPSS estimates a 1.01% chance of exploitation in the next 30 days.

Description

Authentication Bypass by Spoofing vulnerability exists in EcoStruxure Control Expert (all versions prior to V15.0 SP1, including all versions of Unity Pro), EcoStruxure Control Expert V15.0 SP1, EcoStruxure Process Expert (all versions, including all versions of EcoStruxure Hybrid DCS), SCADAPack RemoteConnect for x70 (all versions), Modicon M580 CPU (all versions - part numbers BMEP* and BMEH*), Modicon M340 CPU (all versions - part numbers BMXP34*), that could cause unauthorized access in read and write mode to the controller by spoofing the Modbus communication between the engineering software and the controller.

Metrics

CVSS 3.1
9.1/10

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

EPSS Probability
1.01%

58.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
Schneider-ElectricEcostruxure Control Expert< 15.0
Schneider-ElectricEcostruxure Control Expert15.0
Schneider-ElectricEcostruxure Process ExpertAll versions
Schneider-ElectricRemoteconnectAll versions
Schneider-ElectricModicon M580 Bmep581020 FirmwareAll versions
Schneider-ElectricModicon M580 Bmep581020h FirmwareAll versions
Schneider-ElectricModicon M580 Bmep582020 FirmwareAll versions
Schneider-ElectricModicon M580 Bmep582020h FirmwareAll versions
Schneider-ElectricModicon M580 Bmep582040 FirmwareAll versions
Schneider-ElectricModicon M580 Bmep582040h FirmwareAll versions
Schneider-ElectricModicon M580 Bmep582040s FirmwareAll versions
Schneider-ElectricModicon M580 Bmep583020 FirmwareAll versions
Schneider-ElectricModicon M580 Bmep583040 FirmwareAll versions
Schneider-ElectricModicon M580 Bmep584020 FirmwareAll versions
Schneider-ElectricModicon M580 Bmep584040 FirmwareAll versions
Schneider-ElectricModicon M580 Bmep584040s FirmwareAll versions
Schneider-ElectricModicon M580 Bmep585040 FirmwareAll versions
Schneider-ElectricModicon M580 Bmep585040c FirmwareAll versions
Schneider-ElectricModicon M580 Bmep586040 FirmwareAll versions
Schneider-ElectricModicon M580 Bmep586040c FirmwareAll versions
Schneider-ElectricModicon M580 Bmeh582040 FirmwareAll versions
Schneider-ElectricModicon M580 Bmeh582040c FirmwareAll versions
Schneider-ElectricModicon M580 Bmeh582040s FirmwareAll versions
Schneider-ElectricModicon M580 Bmeh584040 FirmwareAll versions
Schneider-ElectricModicon M580 Bmeh584040c FirmwareAll versions
Schneider-ElectricModicon M580 Bmeh584040s FirmwareAll versions
Schneider-ElectricModicon M580 Bmeh586040 FirmwareAll versions
Schneider-ElectricModicon M580 Bmeh586040c FirmwareAll versions
Schneider-ElectricModicon M580 Bmeh586040s FirmwareAll versions
Schneider-ElectricModicon M340 Bmxp341000 FirmwareAll versions
Schneider-ElectricModicon M340 Bmxp342010 FirmwareAll versions
Schneider-ElectricModicon M340 Bmxp342020 FirmwareAll versions
Schneider-ElectricModicon M340 Bmxp342030 FirmwareAll versions

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-22779?
Authentication Bypass by Spoofing vulnerability exists in EcoStruxure Control Expert (all versions prior to V15.0 SP1, including all versions of Unity Pro), EcoStruxure Control Expert V15.0 SP1, EcoStruxure Process Expert (all versions, including all versions of EcoStruxure Hybrid DCS), SCADAPack RemoteConnect for x70 (all versions), Modicon M580 CPU (all versions - part numbers BMEP* and BMEH*), Modicon M340 CPU (all versions - part numbers BMXP34*), that could cause unauthorized access in read and write mode to the controller by spoofing the Modbus communication between the engineering software and the controller.
How severe is CVE-2021-22779?
CVE-2021-22779 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.01% probability of exploitation in the next 30 days.
How do I fix CVE-2021-22779?
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-2021-22779?

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

Scan your code now

Source: NVD / NIST