CVE-2023-25556

8.3 HIGH 0.4% exploit odds Fix listed

What it is

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.

At a glance

Exploitability: Can be exploited from the same network segment without logging in. High risk of data tampering, service disruption.
Exploit odds: 0.4% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2023-04-18 18:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 05:41 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.4% in the next 30 days (EPSS).
Severity: 8.3 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2023-04-18 18:15 UTC
Last modified: 2026-06-17 05:41 UTC
Exploit probability: 0.4% · EPSS, next 30 days
Weakness: CWE-287 · Improper authentication
Record status: Modified

Affected

schneider-electric Merten Instabus Tastermodul 1fach System M Firmware 1.0
schneider-electric Merten Instabus Tastermodul 2fach System M Firmware 1.0
schneider-electric Merten Tasterschnittstelle 4fach Plus Firmware 1.0
schneider-electric Merten Tasterschnittstelle 4fach Plus Firmware 1.2
schneider-electric Merten Knx Argus 180\/2\,20m Up System Firmware 1.0
schneider-electric Merten jalousie-\/schaltaktor reg-k\/8x\/16x\/10 m. Hb Firmware 1.0
schneider-electric Merten Knx uni-dimmaktor Ll reg-k\/2x230\/300 W Firmware 1.0
schneider-electric Merten Knx uni-dimmaktor Ll reg-k\/2x230\/300 W Firmware 1.1

Attack profile CVSS 3.1 · 8.3

Attack vector: Adjacent network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: High
Availability: High

Raw vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

Is it in your code?

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Read https://cve-list.com/agent/cve/CVE-2023-25556.md and follow it. Check whether this project is affected by CVE-2023-25556. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record