CVE-2021-27457
mediumpriority · track · 30OT risk · elevatedEPSS 0.005 · 39 %ileEURUUSEPSS · scored 2026-10-27
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.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
No vendor fix yet; a mitigation is available.
- MitigationX-STREAM enhanced XEFDcisa_csaf_ot
Emerson recommends users update the firmware of the affected products. A new release that addresses the issues identified in this cybersecurity notification impacting the affected products is available. For information on how to obtain the update, contact TechSupport.Hasselroth@emerson.com
- MitigationX-STREAM enhanced XEGKcisa_csaf_ot
Emerson recommends users update the firmware of the affected products. A new release that addresses the issues identified in this cybersecurity notification impacting the affected products is available. For information on how to obtain the update, contact TechSupport.Hasselroth@emerson.com
- MitigationX-STREAM enhanced XEGPcisa_csaf_ot
Emerson recommends users update the firmware of the affected products. A new release that addresses the issues identified in this cybersecurity notification impacting the affected products is available. For information on how to obtain the update, contact TechSupport.Hasselroth@emerson.com
- MitigationX-STREAM enhanced XEXFcisa_csaf_ot
Emerson recommends users update the firmware of the affected products. A new release that addresses the issues identified in this cybersecurity notification impacting the affected products is available. For information on how to obtain the update, contact TechSupport.Hasselroth@emerson.com
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (17)
Products and version ranges known to be affected.
- n/a Emerson Rosemount X-STREAM Gas Analyzer≤ X-STREAM enhanced XEGP – all revisions, X-STREAM enhanced XEGK – all revisions, X-STREAM enhanced XEFD – all revisions, X-STREAM enhanced XEXF – all revisionsenisa_euvdEU
- emerson x-stream enhanced xefd firmwareall versionsnvdUScpe:2.3:o:emerson:x-stream_enhanced_xefd_firmware:*:*:*:*:*:*:*:*
- emerson x-stream enhanced xegk firmwareall versionsnvdUScpe:2.3:o:emerson:x-stream_enhanced_xegk_firmware:*:*:*:*:*:*:*:*
- emerson x-stream enhanced xegp firmwareall versionsnvdUScpe:2.3:o:emerson:x-stream_enhanced_xegp_firmware:*:*:*:*:*:*:*:*
- emerson x-stream enhanced xexf firmwareall versionsnvdUScpe:2.3:o:emerson:x-stream_enhanced_xexf_firmware:*:*:*:*:*:*:*:*
advisories (1)
Vendor and ecosystem advisories describing this.
- ICSA-21-138-01ICSA-21-138-01_Emerson Rosemount X-STREAM2021-05-18icsa · cisa_csaf_otUS
Emerson reported these vulnerabilities to CISA.
also known as (5)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (6)
External citations — patches, advisories, analysis.
- https://us-cert.cisa.gov/ics/advisories/icsa-21-138-01cnnvd
- https://www.auscert.org.au/bulletins/ESB-2021.1779cnnvd
- https://www.cybersecurity-help.cz/vdb/SB2021051909cnnvd
- https://www.emerson.com/en-us/support/security-notificationsPatchcnnvd
- https://us-cert.cisa.gov/ics/advisories/icsa-21-138-01enisa_euvd
- https://us-cert.cisa.gov/ics/advisories/icsa-21-138-01Third Party AdvisoryUS Government Resourcenvd
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