CVE intelligence and bounded remediation
CVE-2021-22768 — Schneider-Electric Powerlogic Egx100 Firmware security vulnerability
Critical
CVSS 9.8
A CWE-20: Improper Input Validation vulnerability exists in PowerLogic EGX100 (Versions 3.0.0 and newer) and PowerLogic EGX300 (All Versions) that could cause denial of service or remote code execution via a specially crafted HTTP packet.This CVE ID is unique from CVE-2021-22767
- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Published
- 2021-06-11
- CISA KEV
- Not currently listed
- Ecosystem
- operating-system
- Weaknesses
- CWE-20
Affected products
- schneider-electric / powerlogic_egx100_firmware
- schneider-electric / powerlogic_egx300_firmware
Matched remediation archetype
Command, code, expression, and template injection
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Check exposure
- Trace untrusted values to process execution, interpreters, evaluators, template engines, dynamic imports, and administrative scripting features.
- Determine whether the affected path is reachable across each trust boundary and which service account or host privilege it inherits.
- Review configuration for optional execution features, unsafe compatibility modes, and shell invocation.
Remediate safely
- Replace string-built commands or evaluated code with fixed operations and structured argument APIs that do not invoke a shell.
- Use strict allowlists for operation identifiers and reject unexpected input before it reaches any interpreter.
- Update the affected component and add inert regression tests covering metacharacters, encoding variants, and alternate request paths.
Authoritative sources
Complete CVE record and remediation plan
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