CVE-2021-22779
Authentication Bypass by Spoofing vulnerability exists in EcoStruxure Control Expert (all...
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.
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
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2021-22779- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - CVSS 2.0
- 6.4 Medium
AV:N/AC:L/Au:N/C:P/I:P/A:N - Weakness
- CWE-290
- Updated
- 2026-11-02
CVE List
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.
- Record
CVE-2021-22779- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-290
- Updated
- 2026-11-02
EUVDEUVD-2021-9914
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.
- Record
EUVD-2021-9914- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-qx3c-87pm-wqpc
Authentication Bypass by Spoofing vulnerability exists in EcoStruxure Control Expert (all...
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.
- Record
GHSA-qx3c-87pm-wqpc- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-290
- Updated
- 2026-11-02
Affected products
- schneider-electric ecostruxure control expert
- schneider-electric ecostruxure process expert
- schneider-electric remoteconnect
- schneider-electric modicon m340 bmxp341000 firmware
- schneider-electric modicon m340 bmxp342010 firmware
- schneider-electric modicon m340 bmxp342020 firmware
- schneider-electric modicon m340 bmxp342030 firmware
- schneider-electric modicon m580 bmeh582040 firmware
- schneider-electric modicon m580 bmeh582040c firmware
- schneider-electric modicon m580 bmeh582040s firmware
- schneider-electric modicon m580 bmeh584040 firmware
- schneider-electric modicon m580 bmeh584040c firmware
Show 20 moreShow less
- schneider-electric modicon m580 bmeh584040s firmware
- schneider-electric modicon m580 bmeh586040 firmware
- schneider-electric modicon m580 bmeh586040c firmware
- schneider-electric modicon m580 bmeh586040s firmware
- schneider-electric modicon m580 bmep581020 firmware
- schneider-electric modicon m580 bmep581020h firmware
- schneider-electric modicon m580 bmep582020 firmware
- schneider-electric modicon m580 bmep582020h firmware
- schneider-electric modicon m580 bmep582040 firmware
- schneider-electric modicon m580 bmep582040h firmware
- schneider-electric modicon m580 bmep582040s firmware
- schneider-electric modicon m580 bmep583020 firmware
- schneider-electric modicon m580 bmep583040 firmware
- schneider-electric modicon m580 bmep584020 firmware
- schneider-electric modicon m580 bmep584040 firmware
- schneider-electric modicon m580 bmep584040s firmware
- schneider-electric modicon m580 bmep585040 firmware
- schneider-electric modicon m580 bmep585040c firmware
- schneider-electric modicon m580 bmep586040 firmware
- schneider-electric modicon m580 bmep586040c firmware
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-22779 is a critical vulnerability (CVSS 9.1) in Schneider-electric Ecostruxure Control Expert, published July 14, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.05%, the 64th percentile. No source names a fixed version.