VIR Vulnerability Intelligence Relay

CVE-2021-22779

critical
Published 2021-07-14 · Modified 2026-05-29
💬 Discuss on Community ✚ Propose mitigation
CVSS v3
9.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4 NEW
—
not yet in upstream
VIR risk
9.1

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.

Predictions

Exploit likelihood
94%
Patch ETA
—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Application impact
VendorProductVersionsFixed
schneider-electricecostruxure_control_expert{"endExcluding":"15.0"}15.0
schneider-electricecostruxure_control_expert15.0
schneider-electricecostruxure_process_expert
schneider-electricremoteconnect
schneider-electricmodicon_m580_bmep581020-
schneider-electricmodicon_m580_bmep581020h-
schneider-electricmodicon_m580_bmep582020-
schneider-electricmodicon_m580_bmep582020h-
schneider-electricmodicon_m580_bmep582040-
schneider-electricmodicon_m580_bmep582040h-
schneider-electricmodicon_m580_bmep582040s-
schneider-electricmodicon_m580_bmep583020-
schneider-electricmodicon_m580_bmep583040-
schneider-electricmodicon_m580_bmep584020-
schneider-electricmodicon_m580_bmep584040-
schneider-electricmodicon_m580_bmep584040s-
schneider-electricmodicon_m580_bmep585040-
schneider-electricmodicon_m580_bmep585040c-
schneider-electricmodicon_m580_bmep586040-
schneider-electricmodicon_m580_bmep586040c-
schneider-electricmodicon_m580_bmeh582040-
schneider-electricmodicon_m580_bmeh582040c-
schneider-electricmodicon_m580_bmeh582040s-
schneider-electricmodicon_m580_bmeh584040-
schneider-electricmodicon_m580_bmeh584040c-
schneider-electricmodicon_m580_bmeh584040s-
schneider-electricmodicon_m580_bmeh586040-
schneider-electricmodicon_m580_bmeh586040c-
schneider-electricmodicon_m580_bmeh586040s-
schneider-electricmodicon_m340_bmxp341000-
schneider-electricmodicon_m340_bmxp342010-
schneider-electricmodicon_m340_bmxp342020-
schneider-electricmodicon_m340_bmxp342030-

References

CWEs

CWE-290

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.