CVE intelligence and bounded remediation

CVE-2021-22817 — Schneider-Electric Hmibmuhi29D2801 Firmware security vulnerability

High CVSS 7.8

A CWE-276: Incorrect Default Permissions vulnerability exists that could cause unauthorized access to the base installation directory leading to local privilege escalation. Affected Product: Harmony/Magelis iPC Series (All Versions), Vijeo Designer (All Versions prior to V6.2 SP11 Multiple HotFix 4), Vijeo Designer Basic (All Versions prior to V1.2.1)

Severity
High
CVSS
7.8 (3.1)
Published
2022-02-09
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-276

Affected products

  • schneider-electric / hmibmuhi29d2801_firmware
  • schneider-electric / hmibmusi29d2801_firmware
  • schneider-electric / hmibmuci29d2w01_firmware
  • schneider-electric / hmibmu0i29d2001_firmware
  • schneider-electric / hmibmu0i29d200a_firmware
  • schneider-electric / hmibmuhi29d4801_firmware

Showing 6 representative product identities from 49 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Privilege escalation and unsafe privilege management

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Check exposure

  • Map service accounts, operating-system identities, roles, capabilities, impersonation, set-user transitions, and administrative helper paths.
  • Determine whether untrusted users or lower-privilege processes can reach the affected transition or modify inputs it trusts.
  • Review file, socket, registry, device, job, container, and cloud-role permissions used before and after privilege changes.

Remediate safely

  • Apply the supported fix and redesign privileged operations as a minimal, authenticated, allowlisted interface.
  • Drop privileges before processing untrusted input, verify the drop succeeds, and remove unnecessary roles, capabilities, and write permissions.
  • Validate ownership and permissions at time of use and add explicit lower-to-higher privilege boundary tests.

Authoritative sources

Complete CVE record and remediation plan

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