CVE-2026-4827Network attack vector

Unauthorized access via predictable session values

Published May 12, 2026 · Updated May 12, 2026

Insufficient entropy in session management across Schneider Electric power-control products allows remote attackers to gain unauthorized access. Schneider Electric has not disclosed the affected session identifier, entropy source, or algorithm that produces predictable values. Exploitation requires network access and passive victim interaction; unauthorized sessions can expose or alter protected data and degrade service availability.

CVSS severity8.7
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient entropy in session management across Schneider Electric power-control products allows remote attackers to gain unauthorized access. Schneider Electric has not disclosed the affected session identifier, entropy source, or algorithm that produces predictable values. Exploitation requires network access and passive victim interaction; unauthorized sessions can expose or alter protected data and degrade service availability.

The record

CVE
CVE-2026-4827
Published
May 12, 2026
Updated
May 12, 2026
Vendor
Distributed Data Systems
Product
EcoStruxure Power Automation System User Interface
Classifications
CWE-331, CAPEC-59
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 12, 2026CVE publishedPublication date reported by the CVE source.
  2. May 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=Version 3.0.3 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Distributed Data Systems · EcoStruxure Power Automation System User Interfaceversion=Version 3.0.3 and prior
Distributed Data Systems · PowerLogic T500version=Version 11.08.02 and prior
Distributed Data Systems · PowerLogic P7version=V02.002.002 and prior
Distributed Data Systems · Saitel DPversion=Version 11.06.36 and prior
Distributed Data Systems · EcoStruxure Power Operationversion=Version 2022 CU6 and prior; version=Version 2024 CU2 and prior
Distributed Data Systems · PowerLogic C5version=Version 1.1.17 and prior
Distributed Data Systems · PowerLogic P5version=V02.502.103 and prior
Distributed Data Systems · PowerLogic T300version=Version 2.9.4 and prior
Distributed Data Systems · Easergy MiCOM P40version=P_ 4_ _ _ _ _ G_ _ _ _ _ L; version=P_ 4_ _ _ _ _ G_ _ _ _ _ M; version=P_ 4_ _ _ _ _ H_ _ _ _ _ L; version=P_ 4_ _ _ _ _ H_ _ _ _ _ M; version=P_ 4_ _ _ _ _ L _ _ _ _ _ L; version=P_ 4_ _ _ _ _ L _ _ _ _ _ M
Distributed Data Systems · EcoStruxure Power Automation System Gatewayversion=Version 6.4.616.200.100 and prior
Distributed Data Systems · EasyLogic T150version=Version 11.06.30 and prior
Distributed Data Systems · Easergy MiCOM P30version=Easergy MiCOM C434 version prior to C434.679.700; version=Easergy MiCOM P138 version prior to P138.677.700; version=Easergy MiCOM P139 version prior to P139.678.700; version=Easergy MiCOM P436 version prior to P436.677.701; version=Easergy MiCOM P437 version prior to P437.678.700; version=Easergy MiCOM P438 version prior to P438.677.701; version=Easergy MiCOM P439 version prior to P439.678.700; version=Easergy MiCOM P532 version prior to P532.678.700; version=Easergy MiCOM P539 version prior to P539.678.700; version=Easergy MiCOM P631 version prior to P631.678.700; version=Easergy MiCOM P632 version prior to P632.678.700; version=Easergy MiCOM P633 version P633.680.700 only; version=Easergy MiCOM P633 version prior to P633.678.700; version=Easergy MiCOM P634 version P634.680.700 only; version=Easergy MiCOM P634 version prior to P634.678.700; version=Easergy MiCOM P638 version prior to P638.677.700
Distributed Data Systems · iPMFLSversion=Version 64.2025.0.13 and prior
Distributed Data Systems · Easergy MiCOM C264version=Versions D6.x all versions; version=Versions D7.33 and prior

Published CVSS scores

8.7Schneider ElectricCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-331Insufficient Entropy
CAPEC-59Session Credential Falsification through Prediction

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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