CVE-2026-81861Network attack vector

RTU access via exposed Secure Lock credentials

Published Sep 11, 2026 · Updated Sep 11, 2026

Insufficient credential protection in all affected SCADAPack RTUs allows remote attackers to access RTU functions after user interaction. The legacy Secure Lock feature does not adequately protect authentication information, but Schneider Electric has not disclosed the specific storage or transmission operation that exposes it. Exploitation requires user interaction and network reachability and is limited to credential disclosure and unauthorized RTU configuration access.

CVSS severity5.9
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient credential protection in all affected SCADAPack RTUs allows remote attackers to access RTU functions after user interaction. The legacy Secure Lock feature does not adequately protect authentication information, but Schneider Electric has not disclosed the specific storage or transmission operation that exposes it. Exploitation requires user interaction and network reachability and is limited to credential disclosure and unauthorized RTU configuration access.

The record

CVE
CVE-2026-81861
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
Distributed Data Systems
Product
SCADAPack 47x
Classifications
CWE-522, T0859
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 2026Record 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 versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Distributed Data Systems · SCADAPack 47xversion=All versions
Distributed Data Systems · SCADAPack 3xxversion=All versions
Distributed Data Systems · SCADAPack 470Rversion=All versions
Distributed Data Systems · SCADAPack 32version=All versions
Distributed Data Systems · SCADAPack 47xdversion=All versions
Distributed Data Systems · SCADAPack 47xiversion=All versions
Distributed Data Systems · SCADAPack 57xversion=All versions

Published CVSS scores

6.5Schneider ElectricCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
5.9Schneider ElectricCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/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.

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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-522Insufficiently Protected Credentials
T0859Valid Accounts

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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