synced 11 MIN AGO
01 Record

CVE-2023-25556

A CWE-287: Improper Authentication vulnerability exists that could allow a device to be compromised when a key of less than seven digits is entered and the attacker has access to the KNX installation.

HighPUBLISHEDCNA: schneider
CNA base score8.3 CVSS v3.xCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

02 Description

A CWE-287: Improper Authentication vulnerability exists that could allow a device to be compromised when a key of less than seven digits is entered and the attacker has access to the KNX installation.

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.35% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 29.2% of scored records. A rank, not a probability.
NVD base score
8.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2023-04-18 17:03Z3 YR AGO
Last updated
2025-02-05 21:15Z1 YR AGO
Reserved
2023-02-07
Assigning CNA
schneider
Record state
PUBLISHED
Severity
High (CVSS 8.3)
CNA CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
Weaknesses
  • CWE-287Improper AuthenticationClass
Data version
5.1
Document digest
ec45735b59e74b6578d194237f3f010ebd375a8a73392c1d9e8fd96d93eeef74

05 Affected products

VendorProductVersionsPlatforms
Schneider ElectricMerten INSTABUS Tastermodul 1fach System M 625199Program Version 1.0—
Schneider ElectricMerten INSTABUS Tastermodul 2fach System M 625299Program Version 1.0—
Schneider ElectricMerten Tasterschnittstelle 4fach plus 670804Program Version 1.0, Program Version 1.2—
Schneider ElectricMerten KNX ARGUS 180/2,20M UP SYSTEM 631725Program Version 1.0—
Schneider ElectricMerten Jalousie-/Schaltaktor REG-K/8x/16x/10 m. HB 649908Program Version 1.0—
Schneider ElectricMerten KNX Uni-Dimmaktor LL REG-K/2x230/300 W MEG6710-0002Program Version 1.0, Program Version 1.1—
Schneider ElectricMerten KNX Schaltakt.2x6A UP m.2 Eing. MEG6003-0002Program Version 0.1—

06 References