What’s Vulnerable › Vulnerabilities
CVE-2021-22779
- Severity: critical (CVSS 9.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-07-14 · updated 2026-06-17
- Weakness: CWE-290
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.
Affected products
- Schneider Electric EcoStruxure Control Expert: before 15.0; 15.0, 15.0-sp1 — fixed in 15.0
- Schneider Electric EcoStruxure Process Expert: all versions
- Schneider-Electric Modicon M340 Bmxp341000 Firmware: all versions
- Schneider-Electric Modicon M340 Bmxp342010 Firmware: all versions
- Schneider-Electric Modicon M340 Bmxp342020 Firmware: all versions
- Schneider-Electric Modicon M340 Bmxp342030 Firmware: all versions
- Schneider-Electric Modicon M580 Bmeh582040 Firmware: all versions
- Schneider-Electric Modicon M580 Bmeh582040C Firmware: all versions
- Schneider-Electric Modicon M580 Bmeh582040S Firmware: all versions
- Schneider-Electric Modicon M580 Bmeh584040 Firmware: all versions
- Schneider-Electric Modicon M580 Bmeh584040C Firmware: all versions
- Schneider-Electric Modicon M580 Bmeh584040S Firmware: all versions
- Schneider-Electric Modicon M580 Bmeh586040 Firmware: all versions
- Schneider-Electric Modicon M580 Bmeh586040C Firmware: all versions
- Schneider-Electric Modicon M580 Bmeh586040S Firmware: all versions
- Schneider-Electric Modicon M580 Bmep581020 Firmware: all versions
- Schneider-Electric Modicon M580 Bmep581020H Firmware: all versions
- Schneider-Electric Modicon M580 Bmep582020 Firmware: all versions
- Schneider-Electric Modicon M580 Bmep582020H Firmware: all versions
- Schneider-Electric Modicon M580 Bmep582040 Firmware: all versions
- Schneider-Electric Modicon M580 Bmep582040H Firmware: all versions
- Schneider-Electric Modicon M580 Bmep582040S Firmware: all versions
- Schneider-Electric Modicon M580 Bmep583020 Firmware: all versions
- Schneider-Electric Modicon M580 Bmep583040 Firmware: all versions
- Schneider-Electric Modicon M580 Bmep584020 Firmware: all versions
- Schneider-Electric Modicon M580 Bmep584040 Firmware: all versions
- Schneider-Electric Modicon M580 Bmep584040S Firmware: all versions
- Schneider-Electric Modicon M580 Bmep585040 Firmware: all versions
- Schneider-Electric Modicon M580 Bmep585040C Firmware: all versions
- Schneider-Electric Modicon M580 Bmep586040 Firmware: all versions
How to fix
Upgrade to a fixed version: Schneider Electric EcoStruxure Control Expert 15.0. Check the vendor advisory for mitigations.
References
- http://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-194-01
- http://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-194-01
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