Unrestricted file upload in Emerson Rosemount X-STREAM Gas Analyzer
Priority MEDIUM 46CWE-434Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-434.
Summary
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.
Why it matters now
EPSS 0.01752 78th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | 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 revisions | — | No fix listed | CNA |
- Emerson Rosemount X-STREAM Gas Analyzer Vendor— Affected X-STREAM enhanced XEGP – all revisions, X-STREAM enhanced XEGK – all revisions, X-STREAM enhanced XEFD – all revisions, X-STREAM enhanced XEXF – all revisions Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:emerson:x-stream_enhanced_xegp_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Emerson |
| cpe:2.3:h:emerson:x-stream_enhanced_xegp:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Emerson |
| cpe:2.3:o:emerson:x-stream_enhanced_xegk_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Emerson |
| cpe:2.3:h:emerson:x-stream_enhanced_xegk:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Emerson |
| cpe:2.3:o:emerson:x-stream_enhanced_xefd_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Emerson |
| cpe:2.3:h:emerson:x-stream_enhanced_xefd:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Emerson |
| cpe:2.3:o:emerson:x-stream_enhanced_xexf_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Emerson |
| cpe:2.3:h:emerson:x-stream_enhanced_xexf:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Emerson |
- cpe:2.3:o:emerson:x-stream_enhanced_xegp_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Emerson
- cpe:2.3:h:emerson:x-stream_enhanced_xegp:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Emerson
- cpe:2.3:o:emerson:x-stream_enhanced_xegk_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Emerson
- cpe:2.3:h:emerson:x-stream_enhanced_xegk:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Emerson
- cpe:2.3:o:emerson:x-stream_enhanced_xefd_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Emerson
- cpe:2.3:h:emerson:x-stream_enhanced_xefd:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Emerson
- cpe:2.3:o:emerson:x-stream_enhanced_xexf_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Emerson
- cpe:2.3:h:emerson:x-stream_enhanced_xexf:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Emerson
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-27459
- 2026-10-03 Alias added: GHSA-vg6w-cm2v-xcf3
References
More Emerson X-stream Enhanced Xefd Firmware vulnerabilities
- TI-2021-08948 Path traversal in Emerson Rosemount X-STREAM Gas Analyzer CVSS 3.1HIGH 7.5
- TI-2020-16580 Improper authentication in Emerson Rosemount X-STREAM Gas Analyzer CVSS 3.1HIGH 7.5
- TI-2021-08944 Broken or risky cryptographic algorithm in Emerson Rosemount X-STREAM Gas Analyzer CVSS 3.1HIGH 7.5
- TI-2021-08954 Clickjacking in Emerson Rosemount X-STREAM Gas Analyzer CVSS 3.1MEDIUM 6.1
- TI-2021-08952 Cross-site scripting in Emerson Rosemount X-STREAM Gas Analyzer CVSS 3.1MEDIUM 6.1
- TI-2021-08950 A vulnerability has been found in multiple revisions of Emerson Rosemount X-STREAM Gas… CVSS 3.1MEDIUM 5.3
Sources
- CVE-2021-27459 · CVE Program
- CVE-2021-27459 · NVD
- FIRST EPSS
- GHSA-vg6w-cm2v-xcf3 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences