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CVE-2023-42796

HIGH
8.8
CVSS Score
Published: October 10, 2023 at 10:21 AM UTC
Updated: June 17, 2026 at 06:24 AM UTC
6 products affected across 1 vendorCp 8050 FirmwareCp 8031 FirmwareCp-8050

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Severity
HIGH8.8
Exploit prediction
EPSS 1.0%
SSVC
No known exploit

Description

A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05.11), CP-8050 MASTER MODULE (All versions < CPCI85 V05.11). The web server of affected devices fails to properly sanitize user input for the /sicweb-ajax/tmproot/ endpoint. This could allow an authenticated remote attacker to traverse directories on the system and download arbitrary files. By exploring active session IDs, the vulnerability could potentially be leveraged to escalate privileges to the administrator role.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Cp 8031 Firmware· Siemens
95%
v < 05.11
Affected range stops below 05.11, so it looks safe — our inference, not a vendor statement
siemens-cp-8031 (same device)
Cp 8050 Firmware· Siemens
95%
v < 05.11
Affected range stops below 05.11, so it looks safe — our inference, not a vendor statement
siemens-cp-8050 (same device)
CP-8031 MASTER MODULE· Siemens
60%
All versions < CPCI85 V05.11
CP-8050 MASTER MODULE· Siemens
60%
All versions < CPCI85 V05.11
Cp-8031· Siemensdevice
80%
All versions
Cp-8050· Siemensdevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

PatchVendor Advisory
Source: [email protected]
https://cert-portal.siemens.com/productcert/pdf/ssa-770890.pdf

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-22

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