Is CVE-2021-27457 actively exploited?

No active exploitation of CVE-2021-27457 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-27457 be exploited remotely?

Yes. CVE-2021-27457 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-27457?

CVE-2021-27457 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2021-27457

HIGH

CVE-2021-27457

CWE-326Published: May 20, 2021· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2021-27457 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

emerson8 product(s)

x-stream enhanced xegp firmwarex-stream enhanced xegpx-stream enhanced xegk firmwarex-stream enhanced xegkx-stream enhanced xefd firmwarex-stream enhanced xefdx-stream enhanced xexf firmwarex-stream enhanced xexf

Source: NVD CPE · 8 total CPE entries