CVE-2024-31484Public exploit

Memory disclosure and code execution via Session-ID mishandling

Published May 14, 2024 · Updated Feb 13, 2025

Improper null termination in Siemens SICAM device firmware allows local users to disclose memory through a crafted HTTP Session-ID header. The embedded web server either copies exactly 20 header bytes with strncpy without appending a null byte or formats an overlong value into a fixed BSS buffer with sprintf. Affected releases span CPC80 before 16.41, CPCI85 before 5.30, CPCX26 before 06.02, ETA4 before 10.46, ETA5 before 03.27, and PCCX26 before 06.05; exploitation requires user interaction and can expose process memory, crash the service, or enable code execution in the current process.

CVSS severity7.8
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper null termination in Siemens SICAM device firmware allows local users to disclose memory through a crafted HTTP Session-ID header. The embedded web server either copies exactly 20 header bytes with strncpy without appending a null byte or formats an overlong value into a fixed BSS buffer with sprintf. Affected releases span CPC80 before 16.41, CPCI85 before 5.30, CPCX26 before 06.02, ETA4 before 10.46, ETA5 before 03.27, and PCCX26 before 06.05; exploitation requires user interaction and can expose process memory, crash the service, or enable code execution in the current process.

The record

CVE
CVE-2024-31484
Published
May 14, 2024
Updated
Feb 13, 2025
Vendor
Siemens
Product
CPCX26 Central Processing/Communication
Classifications
CWE-170
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 14, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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 <V06.02

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Siemens · CPCX26 Central Processing/Communicationversion=0 <V06.02
Siemens · PCCX26 Ax 1703 PE, Contr, Communication Elementversion=0 <V06.05
Siemens · CPC80 Central Processing/Communicationversion=0 <16.41; version=0 <V16.41
Siemens · ETA4 Ethernet Interface IEC60870-5-104version=0 <V10.46
Siemens · ETA5 Ethernet Int. 1x100TX IEC61850 Ed.2version=0 <V03.27
Siemens · CPCI85 Central Processing/Communicationversion=0 <5.30; version=0 <V5.30

Published CVSS scores

7.8Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.3Siemens ProductCERTCVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-170Improper Null Termination

Public exploit references

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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