CVE-2025-30176Network attack vector

Service crash via malformed RISOPEN message

Published May 13, 2025 · Updated Jul 8, 2025

Out-of-bounds read in Siemens UMC and integrated products allows unauthenticated remote attackers to crash services via a malformed RISOPEN message. The GpsReadStr routine in um.gpslib.dll over-reads a buffer while parsing the malformed message, causing a read access violation. Network access to UMC on TCP ports 4002 or 4004 is sufficient, and the demonstrated consequence is service interruption rather than data disclosure or modification.

CVSS severity8.7
High
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Siemens UMC and integrated products allows unauthenticated remote attackers to crash services via a malformed RISOPEN message. The GpsReadStr routine in um.gpslib.dll over-reads a buffer while parsing the malformed message, causing a read access violation. Network access to UMC on TCP ports 4002 or 4004 is sufficient, and the demonstrated consequence is service interruption rather than data disclosure or modification.

The record

CVE
CVE-2025-30176
Published
May 13, 2025
Updated
Jul 8, 2025
Vendor
Siemens
Product
SINEC NMS
Classifications
CWE-125, T0814
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 13, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 8, 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=0 <V4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Siemens · SINEC NMSversion=0 <V4.0
Siemens · User Management Component (UMC)version=0 <V2.15.1.1
Siemens · TIA Portalversion=0 <*
Siemens · SINEMA Remote Connect Serverversion=0 <*
Siemens · SIMATIC PCS neoversion=0 <*

Published CVSS scores

7.5Siemens ProductCERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7Siemens ProductCERTCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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-125Out-of-bounds Read
T0814Denial of Service

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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