CVE intelligence and bounded remediation

CVE-2021-27457 — A vulnerability has been found in multiple revisions of Emerson Rosemount X-STREAM Gas Analyzer

High CVSS 7.5

A vulnerability has been found in multiple revisions of Emerson Rosemount X-STREAM Gas Analyzer. The affected products utilize a weak encryption algorithm for storage of sensitive data, which may allow an attacker to more easily obtain credentials used for access.

Severity
High
CVSS
7.5 (3.1)
Published
2021-05-20
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-326, CWE-327

Affected products

  • emerson / x-stream_enhanced_xegp_firmware
  • emerson / x-stream_enhanced_xegk_firmware
  • emerson / x-stream_enhanced_xefd_firmware
  • emerson / x-stream_enhanced_xexf_firmware

Matched remediation archetype

Cryptography, certificate, signature, and channel validation

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

Check exposure

  • Inventory affected algorithms, key uses, trust stores, certificate validation settings, random sources, and plaintext channels across clients and services.
  • Determine which secrets, identities, signatures, or data protections depend on the affected primitive or validation path.
  • Check debug, compatibility, fallback, and hostname or audience override settings in build and runtime configuration.

Remediate safely

  • Use a maintained platform cryptographic API with approved algorithms, modes, parameters, randomness, and full peer identity validation.
  • Remove insecure fallback and validation bypasses; separate keys by purpose and load them from managed secret storage.
  • Plan rotation or reissuance for affected keys, certificates, tokens, hashes, or ciphertext and document compatibility sequencing.

Authoritative sources

Complete CVE record and remediation plan

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