CVE-2025-7773Network attack vector

Unauthenticated session hijacking via predictable identifiers

Published Aug 14, 2025 · Updated Aug 14, 2025

Incorrect authorization in Rockwell Automation 5032 configurable I/O firmware 1.011 allows remote attackers to hijack web sessions. The embedded web server advances its session number on a timing interval correlated with the two preceding sign-in intervals, making the next identifier predictable. Network access is sufficient and requires neither credentials nor user interaction; a hijacked session permits data exposure or alteration and can interrupt device availability.

CVSS severity8.6
High
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Rockwell Automation 5032 configurable I/O firmware 1.011 allows remote attackers to hijack web sessions. The embedded web server advances its session number on a timing interval correlated with the two preceding sign-in intervals, making the next identifier predictable. Network access is sufficient and requires neither credentials nor user interaction; a hijacked session permits data exposure or alteration and can interrupt device availability.

The record

CVE
CVE-2025-7773
Published
Aug 14, 2025
Updated
Aug 14, 2025
Vendor
Rockwell Automation
Product
5032-CFGB16M12P5DR
Classifications
CWE-863, T1550.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 14, 2025Record 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=1.011

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rockwell Automation · 5032-CFGB16M12P5DRversion=1.011
Rockwell Automation · 5032-CFGB16M12M12LDRversion=1.011
Rockwell Automation · 5032-CFGB16M12DRversion=1.011

Published CVSS scores

8.8Rockwell AutomationCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
8.6Rockwell AutomationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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-863Incorrect Authorization
T1550.004Web Session Cookie

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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