CVE intelligence and bounded remediation

CVE-2021-22377 — Huawei S12700 Firmware security vulnerability

High CVSS 7.2

There is a command injection vulnerability in S12700 V200R019C00SPC500, S2700 V200R019C00SPC500, S5700 V200R019C00SPC500, S6700 V200R019C00SPC500 and S7700 V200R019C00SPC500. A module does not verify specific input sufficiently. Attackers can exploit this vulnerability by sending malicious parameters to inject command. This can compromise normal service.

Severity
High
CVSS
7.2 (3.1)
Published
2021-06-22
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-20

Affected products

  • huawei / s12700_firmware / v200r019c00spc500
  • huawei / s2700_firmware / v200r019c00spc500
  • huawei / s5700_firmware / v200r019c00spc500
  • huawei / s6700_firmware / v200r019c00spc500
  • huawei / s7700_firmware / v200r019c00spc500

Matched remediation archetype

Command, code, expression, and template injection

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

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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