CVE-2026-9307Network attack vector

CIP connection ID disclosure via diagnostics page

Published Jun 16, 2026 · Updated Jun 16, 2026

Information disclosure in Rockwell Automation CompactLogix 5370 through V37.011 allows remote attackers to read CIP Connection IDs. The embedded web server returns these identifiers on an unauthenticated diagnostics page instead of restricting them to an authorized control sphere. Network reachability and enabled controller web pages are required; the disclosed identifiers support malicious CIP packets that can interrupt controller service.

CVSS severity6.3
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Rockwell Automation CompactLogix 5370 through V37.011 allows remote attackers to read CIP Connection IDs. The embedded web server returns these identifiers on an unauthenticated diagnostics page instead of restricting them to an authorized control sphere. Network reachability and enabled controller web pages are required; the disclosed identifiers support malicious CIP packets that can interrupt controller service.

The record

CVE
CVE-2026-9307
Published
Jun 16, 2026
Updated
Jun 16, 2026
Vendor
Rockwell Automation
Product
CompactLogix 5370
Classifications
CWE-497, T1046
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 16, 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=V36

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rockwell Automation · CompactLogix 5370version=V36

Published CVSS scores

5.3Rockwell AutomationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
6.3Rockwell AutomationCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/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-497Exposure of Sensitive System Information to an Unauthorized Control Sphere
T1046Network Service Discovery

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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