CVE-2025-40802

Temporary service interruption via UDP query exhaustion

Published Sep 9, 2025 · Updated Sep 9, 2025

Resource exhaustion in Siemens RUGGEDCOM RST2428P all versions allows attackers to interrupt service with high-volume UDP queries. Open UDP discovery services on ports 34964 and 49152–65535 exhaust device resources under sustained query volume; Siemens has not disclosed the responsible handler or allocation behavior. No authentication or user interaction is required, but adjacent-network access and high request volume are necessary; service recovers after traffic stops.

CVSS severity2.3
Low
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Siemens RUGGEDCOM RST2428P all versions allows attackers to interrupt service with high-volume UDP queries. Open UDP discovery services on ports 34964 and 49152–65535 exhaust device resources under sustained query volume; Siemens has not disclosed the responsible handler or allocation behavior. No authentication or user interaction is required, but adjacent-network access and high request volume are necessary; service recovers after traffic stops.

The record

CVE
CVE-2025-40802
Published
Sep 9, 2025
Updated
Sep 9, 2025
Vendor
Siemens
Product
RUGGEDCOM RST2428P
Classifications
CWE-400, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 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 <*

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Siemens · RUGGEDCOM RST2428Pversion=0 <*

Published CVSS scores

3.1Siemens AGCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
4.3NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
2.3Siemens AGCVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

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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