CVE-2023-1935Network attack vector

Unauthenticated data access and device control

Published Aug 2, 2023 · Updated Oct 21, 2024

Authentication bypass in Emerson ROC800-Series RTUs allows remote attackers to access data or device control via network requests. Emerson and CISA have not published the affected protocol, request, or authentication check that fails to reject unauthenticated input. Network reachability is sufficient; exploitation permits data access, controller manipulation, or a service interruption.

CVSS severity9.4
Critical
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Emerson ROC800-Series RTUs allows remote attackers to access data or device control via network requests. Emerson and CISA have not published the affected protocol, request, or authentication check that fails to reject unauthenticated input. Network reachability is sufficient; exploitation permits data access, controller manipulation, or a service interruption.

The record

CVE
CVE-2023-1935
Published
Aug 2, 2023
Updated
Oct 21, 2024
Vendor
Emerson Electric Co.
Product
ROC809 Remote Operations Controller
Classifications
CWE-305, T0866
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 2, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 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

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Emerson Electric Co. · ROC809 Remote Operations Controllerversion=All
Emerson Electric Co. · DL8000 Preset Controllerversion=All
Emerson Electric Co. · ROC809L Remote Operations Controllerversion=All
Emerson Electric Co. · ROC827 Remote Operations Controllerversion=All

Published CVSS scores

9.4CISA ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

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-305Authentication Bypass by Primary Weakness
T0866Exploitation of Remote Services

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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