CVE intelligence and bounded remediation

CVE-2021-22731 — Schneider-Electric Mcsesp083F23G0 Firmware security vulnerability

Critical CVSS 9.8

Weak Password Recovery Mechanism for Forgotten Password vulnerability exists on Modicon Managed Switch MCSESM* and MCSESP* V8.21 and prior which could cause an unauthorized password change through HTTP / HTTPS when basic user information is known by a remote attacker.

Severity
Critical
CVSS
9.8 (3.1)
Published
2021-05-26
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-640

Affected products

  • schneider-electric / mcsesp083f23g0_firmware
  • schneider-electric / mcsesp083f23g0t_firmware
  • schneider-electric / mcsesm043f23f0_firmware
  • schneider-electric / mcsesm053f1cu0_firmware
  • schneider-electric / mcsesm063f2cu0_firmware
  • schneider-electric / mcsesm053f1cs0_firmware

Showing 6 representative product identities from 16 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

General vulnerability remediation

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Confirm the affected component, deployment paths, reachable interfaces, and enabled features from inventories and configuration, without probing production destructively.
  • Compare the advisory's affected conditions with the repository lockfiles, build manifests, artifacts, and runtime inventory.
  • Identify data sensitivity, trust boundaries, and privilege level for every confirmed affected deployment.

Remediate safely

  • Apply a vendor-supported fix or remove the affected component or feature; record the selected change and its source in the repository.
  • Update direct and transitive dependency locks, generated artifacts, deployment manifests, and asset inventories together.
  • Add a regression test for the documented unsafe condition using inert inputs and preserve rollback instructions.

Authoritative sources

Complete CVE record and remediation plan

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