CVE-2026-35075 PUBLISHED

Hardcoded default Password for Service Account

Assigner: CERTVDE
Reserved: 01.04.2026 Published: 03.06.2026 Updated: 03.06.2026

An unauthenticated remote attacker can recover a default, hard coded password from a firmware image and thus gain full access to all affected devices.

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	MBS
Product	Single-A
Versions	Default: unaffected affected from V1_0_0_0 to V6_0_0_7 (excl.)

Vendor	MBS
Product	Double-A Profibus
Versions	Default: unaffected affected from V1_0_0_0 to V6_0_0_7 (excl.)

Vendor	MBS
Product	Double-A x-link
Versions	Default: unaffected affected from V1_0_0_0 to V6_0_0_7 (excl.)

Vendor	MBS
Product	Single-X
Versions	Default: unaffected affected from V1_0_0_0 to V6_0_0_7 (excl.)

Vendor	MBS
Product	Double-X CAN
Versions	Default: unaffected affected from V1_0_0_0 to V6_0_0_7 (excl.)

Vendor	MBS
Product	Double-X DALI
Versions	Default: unaffected affected from V1_0_0_0 to V6_0_0_7 (excl.)

Vendor	MBS
Product	Double-X KNX
Versions	Default: unaffected affected from V1_0_0_0 to V6_0_0_7 (excl.)

Vendor	MBS
Product	Double-X LON
Versions	Default: unaffected affected from V1_0_0_0 to V6_0_0_7 (excl.)

Vendor	MBS
Product	Double-X M-Bus
Versions	Default: unaffected affected from V1_0_0_0 to V6_0_0_7 (excl.)

Vendor	MBS
Product	Double-X PROFINET
Versions	Default: unaffected affected from V1_0_0_0 to V6_0_0_7 (excl.)

Vendor	MBS
Product	Double-X x-link
Versions	Default: unaffected affected from V1_0_0_0 to V6_0_0_7 (excl.)

Vendor	MBS
Product	Triple-X KNX+DALI
Versions	Default: unaffected affected from V1_0_0_0 to V6_0_0_7 (excl.)

Vendor	MBS
Product	Triple-X KNX+LON
Versions	Default: unaffected affected from V1_0_0_0 to V6_0_0_7 (excl.)

Vendor	MBS
Product	Triple-X KNX+M-Bus
Versions	Default: unaffected affected from V1_0_0_0 to V6_0_0_7 (excl.)

Vendor	MBS
Product	Triple-X PROFINET+DALI
Versions	Default: unaffected affected from V1_0_0_0 to V6_0_0_7 (excl.)

Vendor	MBS
Product	Triple-X PROFINET+KNX
Versions	Default: unaffected affected from V1_0_0_0 to V6_0_0_7 (excl.)

Vendor	MBS
Product	Triple-X PROFINET+LON
Versions	Default: unaffected affected from V1_0_0_0 to V6_0_0_7 (excl.)

Vendor	MBS
Product	Triple-X PROFINET+M-Bus
Versions	Default: unaffected affected from V1_0_0_0 to V6_0_0_7 (excl.)

Credits

Adrien Rey from Cyber Defense Campus Zurich finder
Daniel Hulliger from Armasuisse finder

References

https://www.certvde.com/en/advisories/VDE-2026-039/

Problem Types

CWE-1393 Use of Default Password CWE