What’s Vulnerable › Vulnerabilities

CVE-2021-27459

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-05-20 · updated 2026-06-17
• Weakness: CWE-434

Description

A vulnerability has been found in multiple revisions of Emerson Rosemount X-STREAM Gas Analyzer. The webserver of the affected products allows unvalidated files to be uploaded, which an attacker could utilize to execute arbitrary code.

Affected products

• Emerson X-Stream Enhanced Xefd Firmware: all versions
• Emerson X-Stream Enhanced Xegk Firmware: all versions
• Emerson X-Stream Enhanced Xegp Firmware: all versions
• Emerson X-Stream Enhanced Xexf Firmware: all versions

References

• https://us-cert.cisa.gov/ics/advisories/icsa-21-138-01
• https://us-cert.cisa.gov/ics/advisories/icsa-21-138-01

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