CVE-2025-29931 Denial of service in TeleControl Server Basic

Medium 6.3 Published Updated

Unauthenticated remote attackers can cause a partial denial of service in redundant setups by exploiting improper length validation in serialized messages.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
Not needed
Fix
None listed

What is CVE-2025-29931?

CVE-2025-29931 is a medium-severity denial of service vulnerability in Siemens Telecontrol Server Basic, published on 17 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability has been identified in TeleControl Server Basic (All versions < V3.1.2.2). The affected product does not properly validate a length field in a serialized message which it uses to determine the amount of memory to be allocated for deserialization. This could allow an unauthenticated remote attacker to cause the application to allocate exhaustive amounts of memory and subsequently create a partial denial of service condition. Successful exploitation is only possible in redundant Telecontrol Server Basic setups and only if the connection between the redundant servers has been disrupted.

Weakness: CWE-130

Which versions are affected by CVE-2025-29931?

It affects 1 product.

Products include Siemens Telecontrol Server Basic.

How do I fix CVE-2025-29931?

No fix has been published for CVE-2025-29931 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2025-29931 being exploited?

There is no known exploitation of CVE-2025-29931 in the wild and no public exploit code.

All Siemens Telecontrol Server Basic vulnerabilities

Sources

Also known as GHSA-5659-7353-7w5p.

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