Improper authentication in Schneider Electric Merten INSTABUS Tastermodul 1fach System M…
Priority LOW 38CWE-287Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-287.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00358 29th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Schneider Electric | Merten INSTABUS Tastermodul 1fach System M 625199 | Program Version 1.0 | — | No fix listed | CNA |
| Schneider Electric | Merten INSTABUS Tastermodul 2fach System M 625299 | Program Version 1.0 | — | No fix listed | CNA |
| Schneider Electric | Merten Tasterschnittstelle 4fach plus 670804 | Program Version 1.0; Program Version 1.2 | — | No fix listed | CNA |
| Schneider Electric | Merten KNX ARGUS 180/2,20M UP SYSTEM 631725 | Program Version 1.0 | — | No fix listed | CNA |
| Schneider Electric | Merten Jalousie-/Schaltaktor REG-K/8x/16x/10 m. HB 649908 | Program Version 1.0 | — | No fix listed | CNA |
| Schneider Electric | Merten KNX Uni-Dimmaktor LL REG-K/2x230/300 W MEG6710-0002 | Program Version 1.0; Program Version 1.1 | — | No fix listed | CNA |
| Schneider Electric | Merten KNX Schaltakt.2x6A UP m.2 Eing. MEG6003-0002 | Program Version 0.1 | — | No fix listed | CNA |
- Merten INSTABUS Tastermodul 1fach System M 625199 VendorSchneider Electric Affected Program Version 1.0 Fixed in — No fix listed CNA
- Merten INSTABUS Tastermodul 2fach System M 625299 VendorSchneider Electric Affected Program Version 1.0 Fixed in — No fix listed CNA
- Merten Tasterschnittstelle 4fach plus 670804 VendorSchneider Electric Affected Program Version 1.0; Program Version 1.2 Fixed in — No fix listed CNA
- Merten KNX ARGUS 180/2,20M UP SYSTEM 631725 VendorSchneider Electric Affected Program Version 1.0 Fixed in — No fix listed CNA
- Merten Jalousie-/Schaltaktor REG-K/8x/16x/10 m. HB 649908 VendorSchneider Electric Affected Program Version 1.0 Fixed in — No fix listed CNA
- Merten KNX Uni-Dimmaktor LL REG-K/2x230/300 W MEG6710-0002 VendorSchneider Electric Affected Program Version 1.0; Program Version 1.1 Fixed in — No fix listed CNA
- Merten KNX Schaltakt.2x6A UP m.2 Eing. MEG6003-0002 VendorSchneider Electric Affected Program Version 0.1 Fixed in — No fix listed CNA
CPE configurations NVD · 16
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:schneider-electric:merten_instabus_tastermodul_1fach_system_m_firmware:1.0:*:*:*:*:*:*:* | 1.0 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:merten_instabus_tastermodul_1fach_system_m:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:merten_instabus_tastermodul_2fach_system_m_firmware:1.0:*:*:*:*:*:*:* | 1.0 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:merten_instabus_tastermodul_2fach_system_m:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:merten_tasterschnittstelle_4fach_plus_firmware:1.0:*:*:*:*:*:*:* | 1.0 | Vulnerable | Schneider Electric |
| cpe:2.3:o:schneider-electric:merten_tasterschnittstelle_4fach_plus_firmware:1.2:*:*:*:*:*:*:* | 1.2 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:merten_tasterschnittstelle_4fach_plus:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:merten_knx_argus_180\/2\,20m_up_system_firmware:1.0:*:*:*:*:*:*:* | 1.0 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:merten_knx_argus_180\/2\,20m_up_system:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:merten_jalousie-\/schaltaktor_reg-k\/8x\/16x\/10_m._hb_firmware:1.0:*:*:*:*:*:*:* | 1.0 | Vulnerable | Schneider Electric |
- cpe:2.3:o:schneider-electric:merten_instabus_tastermodul_1fach_system_m_firmware:1.0:*:*:*:*:*:*:* Versions 1.0 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:merten_instabus_tastermodul_1fach_system_m:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:merten_instabus_tastermodul_2fach_system_m_firmware:1.0:*:*:*:*:*:*:* Versions 1.0 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:merten_instabus_tastermodul_2fach_system_m:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:merten_tasterschnittstelle_4fach_plus_firmware:1.0:*:*:*:*:*:*:* Versions 1.0 Vulnerable ·Schneider Electric
- cpe:2.3:o:schneider-electric:merten_tasterschnittstelle_4fach_plus_firmware:1.2:*:*:*:*:*:*:* Versions 1.2 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:merten_tasterschnittstelle_4fach_plus:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:merten_knx_argus_180\/2\,20m_up_system_firmware:1.0:*:*:*:*:*:*:* Versions 1.0 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:merten_knx_argus_180\/2\,20m_up_system:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:merten_jalousie-\/schaltaktor_reg-k\/8x\/16x\/10_m._hb_firmware:1.0:*:*:*:*:*:*:* Versions 1.0 Vulnerable ·Schneider Electric
Show 6 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:h:schneider-electric:merten_jalousie-\/schaltaktor_reg-k\/8x\/16x\/10_m._hb:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:merten_knx_uni-dimmaktor_ll_reg-k\/2x230\/300_w_firmware:1.0:*:*:*:*:*:*:* | 1.0 | Vulnerable | Schneider Electric |
| cpe:2.3:o:schneider-electric:merten_knx_uni-dimmaktor_ll_reg-k\/2x230\/300_w_firmware:1.1:*:*:*:*:*:*:* | 1.1 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:merten_knx_uni-dimmaktor_ll_reg-k\/2x230\/300_w:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:merten_knx_schaltakt.2x6a_up_m.2_eing._firmware:0.1:*:*:*:*:*:*:* | 0.1 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:merten_knx_schaltakt.2x6a_up_m.2_eing.:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
- cpe:2.3:h:schneider-electric:merten_jalousie-\/schaltaktor_reg-k\/8x\/16x\/10_m._hb:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:merten_knx_uni-dimmaktor_ll_reg-k\/2x230\/300_w_firmware:1.0:*:*:*:*:*:*:* Versions 1.0 Vulnerable ·Schneider Electric
- cpe:2.3:o:schneider-electric:merten_knx_uni-dimmaktor_ll_reg-k\/2x230\/300_w_firmware:1.1:*:*:*:*:*:*:* Versions 1.1 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:merten_knx_uni-dimmaktor_ll_reg-k\/2x230\/300_w:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:merten_knx_schaltakt.2x6a_up_m.2_eing._firmware:0.1:*:*:*:*:*:*:* Versions 0.1 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:merten_knx_schaltakt.2x6a_up_m.2_eing.:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-25556
- 2026-10-03 Alias added: GHSA-q53x-4f23-hq3j
References
Sources
- CVE-2023-25556 · CVE Program
- CVE-2023-25556 · NVD
- FIRST EPSS
- GHSA-q53x-4f23-hq3j · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences