CVE-2026-5387Network attack vector

Unauthenticated data modification via unchecked API methods

Published Apr 15, 2026 · Updated Apr 15, 2026

Missing authorization in AVEVA Pipeline Simulation 2025 SP1 and earlier allows remote attackers to modify simulation and training data. A subset of Pipeline Simulation Server API methods fails to enforce Simulator Instructor or Simulator Developer role checks on unauthenticated requests. Network access to the Server API is sufficient, and successful requests can alter simulation parameters, training configuration, and training records without reported availability impact.

CVSS severity9.3
Critical
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in AVEVA Pipeline Simulation 2025 SP1 and earlier allows remote attackers to modify simulation and training data. A subset of Pipeline Simulation Server API methods fails to enforce Simulator Instructor or Simulator Developer role checks on unauthenticated requests. Network access to the Server API is sufficient, and successful requests can alter simulation parameters, training configuration, and training records without reported availability impact.

The record

CVE
CVE-2026-5387
Published
Apr 15, 2026
Updated
Apr 15, 2026
Vendor
AVEVA
Product
AVEVA Pipeline Simulation
Classifications
CWE-862, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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=0 <=2025 SP1 (build 7.1.9497.6351)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

AVEVA · AVEVA Pipeline Simulationversion=0 <=2025 SP1 (build 7.1.9497.6351)

Published CVSS scores

9.1CISACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
9.3AVEVACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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.

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-862Missing Authorization
T1210Exploitation 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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