CVE-2023-48363

Persistent RPC service interruption via null dereference

Published Feb 13, 2024 · Updated Sep 10, 2024

Null pointer dereference in Siemens industrial software RPC servers allows remote attackers on an adjacent network to interrupt service. The RPC protocol implementation dereferences a null pointer while processing certain unorganized RPC messages, terminating the RPC server. No privileges or user interaction are required, but adjacent-network access is necessary; Siemens describes the denial of service as persistent.

CVSS severity6.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null pointer dereference in Siemens industrial software RPC servers allows remote attackers on an adjacent network to interrupt service. The RPC protocol implementation dereferences a null pointer while processing certain unorganized RPC messages, terminating the RPC server. No privileges or user interaction are required, but adjacent-network access is necessary; Siemens describes the denial of service as persistent.

The record

CVE
CVE-2023-48363
Published
Feb 13, 2024
Updated
Sep 10, 2024
Vendor
Siemens
Product
SIMATIC Route Control
Classifications
CWE-476, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2024Record 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=All versions < V9.1 SP2 UC05

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Siemens · SIMATIC Route Controlversion=All versions < V9.1 SP2 UC05
Siemens · SIMATIC WinCCversion=0 <*; version=0 <V7.5 SP2 Update 15; version=0 <V8.0 Update 4
Siemens · OpenPCS 7version=All versions < V9.1 SP2 UC05
Siemens · SIMATIC BATCHversion=All versions < V9.1 SP2 UC05
Siemens · SIMATIC PCS 7version=0 <V9.1 SP2 UC05
Siemens · SIMATIC WinCC Runtime Professionalversion=0 <V18 Update 4; version=0 <V19 Update 2

Published CVSS scores

6.5Siemens AGCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.1Siemens AGCVSS:4.0/AV:A/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.

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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-476NULL Pointer Dereference
T1499Endpoint Denial 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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