CVE-2025-29931Network attack vector

Partial denial of service via length-driven allocation

Published Apr 17, 2025 · Updated Apr 17, 2025

Improper length handling in Siemens TeleControl Server Basic before 3.1.2.2 allows remote attackers to partially interrupt service. Deserialization trusts a serialized-message length field when calculating an allocation, allowing a crafted value to exhaust available memory. Exploitation requires a redundant deployment and a disrupted connection between the redundant servers; the reported consequence is limited to partial service interruption.

CVSS severity6.3
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper length handling in Siemens TeleControl Server Basic before 3.1.2.2 allows remote attackers to partially interrupt service. Deserialization trusts a serialized-message length field when calculating an allocation, allowing a crafted value to exhaust available memory. Exploitation requires a redundant deployment and a disrupted connection between the redundant servers; the reported consequence is limited to partial service interruption.

The record

CVE
CVE-2025-29931
Published
Apr 17, 2025
Updated
Apr 17, 2025
Vendor
Siemens
Product
TeleControl Server Basic
Classifications
CWE-130, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 17, 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 <V3.1.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Siemens · TeleControl Server Basicversion=0 <V3.1.2.2

Published CVSS scores

6.3Siemens AGCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
3.7Siemens AGCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

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-130Improper Handling of Length Parameter Inconsistency
T1210Exploitation of Remote Services

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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