CVE-2021-27448

Local privilege escalation via file-system miscommunication

Published Mar 25, 2021 · Updated Aug 3, 2024

Privilege escalation in GE Vernova Reason MU320E firmware before 04A00.1 allows local users with device access to gain elevated privileges. CISA identifies a miscommunication in the device file system but does not disclose the affected file, process, or incorrect operation. Existing low-privilege local access to the appliance is required; successful exploitation enables privileged control of device data and operation.

CVSS severity7.8
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in GE Vernova Reason MU320E firmware before 04A00.1 allows local users with device access to gain elevated privileges. CISA identifies a miscommunication in the device file system but does not disclose the affected file, process, or incorrect operation. Existing low-privilege local access to the appliance is required; successful exploitation enables privileged control of device data and operation.

The record

CVE
CVE-2021-27448
Published
Mar 25, 2021
Updated
Aug 3, 2024
Vendor
GE Vernova
Product
Reason MU320E
Classifications
CWE-269, CWE-250, T0890
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=All firmware versions prior to v04A00.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

GE Vernova · Reason MU320Eversion=All firmware versions prior to v04A00.1

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management
CWE-250Execution with Unnecessary Privileges
T0890Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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