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No exploitation reportedFix available

CVE-2023-33920

No exploitation reported by the sources we read.

  • Published2023-06-13
  • Fixed inv05
  • WeaknessCWE-798

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05), CP-8050 MASTER MODULE (All versions < CPCI85 V05). The affected devices contain the hash of the root password in a hard-coded form, which could be exploited for UART console login to the device. An attacker with direct physical access could exploit this vulnerability.

Timeline

dates in UTC
  1. 2023-06-1309:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-33920?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-33920?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Siemens cpci85 firmwareversion to verify
BranchAffectedFixed in
5.x< v05v05

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-23-166-13 CISA2 known affected

    Siemens SICAM A8000 Devices

    CP-8031 MASTER MODULE (6MF2803-1AA00) · CP-8050 MASTER MODULE (6MF2805-0AA00)

Full record on NVD

Fix

  1. Update Siemens cpci85 firmware to v05
  2. Vendor fix CISA ICSA-23-166-13 · 1 productUpdate to CPCI85 V05 or later version

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • CISA-ADPSSVC decisionnone2025-01-03
  • OpenCVESSVC decisionnone—
  • CNACVSS 3.16.8read 2026-10-23
  • NVDCVSS 3.16.8read 2026-10-23
  • CNAweakness (CWE)CWE-798read 2026-10-23
  • NVDweakness (CWE)CWE-798read 2026-10-23
  • FIRST EPSSEPSS score0.4 %2026-10-23

Technical details

CVSS v3 Vector
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2023-06-13
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2023-33920?

A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05), CP-8050 MASTER MODULE (All versions < CPCI85 V05). The affected devices contain the hash of the root password in a hard-coded form, which could be exploited for UART console login to the device. An attacker with direct physical access could exploit this vulnerability.

Is CVE-2023-33920 actively exploited?

Active exploitation of CVE-2023-33920 has not been confirmed. Its EPSS score was 0.4% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-33920?

CVE-2023-33920 has a CVSS v3 base score of 6.8 (MEDIUM severity), with vector string CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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