A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05), CP-8050 MASTER MODULE (All versions < CPCI85 V05).

published 2023-04-11 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-32159

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 2.8%; EPSS 2.8% chance of exploitation in 30 days, percentile 86%
public exploits: 0; none known

A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05), CP-8050 MASTER MODULE (All versions < CPCI85 V05). Affected devices are vulnerable to command injection via the web server port 443/tcp, if the parameter “Remote Operation” is enabled. The parameter is disabled by default. The vulnerability could allow an unauthenticated remote attacker to perform arbitrary code execution on the device.

Patch / fix

fixed in 2

siemens cp-8031_firmware cpci85_v05
siemens cp-8050_firmware cpci85_v05

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-23-103-07 updated 2023-04-11 cvss 9.8

Siemens CPCI85 Firmware of SICAM A8000 Devices

Siemens CP-8031 MASTER MODULE (6MF2803-1AA00) <vers:/_CPCI85_V05 Siemens CP-8050 MASTER MODULE (6MF2805-0AA00) <vers:/_CPCI85_V05
affected: vendor fix, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: total
Assessed: 21 mo ago (2025-02-07)

Exploit prediction

2.84% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Siemens CP-8031 MASTER MODULE
Siemens CP-8050 MASTER MODULE

Classification

Weakness

CWE-77 Improper Neutralization of Special Elements used in a Command

References

Sources

CVE List CVE-2023-28489
NVD CVE-2023-28489

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary