# CVE-2021-27463

## Summary

- **CVE ID:** CVE-2021-27463
- **Severity:** UNKNOWN
- **CVSS Score:** 0.01
- **CWE:** CWE-539
- **Published:** May 20, 2021
- **Last Modified:** Mar 13, 2026

## Description

A vulnerability has been found in multiple revisions of Emerson Rosemount X-STREAM Gas Analyzer. The affected applications utilize persistent cookies where the session cookie attribute is not properly invalidated, allowing an attacker to intercept the cookies and gain access to sensitive information.

## Affected Products

- 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 revisions)

## References

- [CNA](https://us-cert.cisa.gov/ics/advisories/icsa-21-138-01)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.90%
- **EPSS Percentile:** 57.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-12._