Vulnerability · Published Jun 3, 2026 · Assigned by CERTVDE
CVE-2026-35075Hardcoded default Password for Service Account
Critical 9.8
In plain English
A critical-severity security flaw in Double-A Profibus from MBS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.5%top 59.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An unauthenticated remote attacker can recover a default, hard coded password from a firmware image and thus gain full access to all affected devices.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| MBS | Single-A | V1_00_00 – before V6_00_07 |
| MBS | Double-A Profibus | V1_00_00 – before V6_00_07 |
| MBS | Double-A x-link | V1_00_00 – before V6_00_07 |
| MBS | Single-X | V1_00_00 – before V6_00_07 |
| MBS | Double-X CAN | V1_00_00 – before V6_00_07 |
| MBS | Double-X DALI | V1_00_00 – before V6_00_07 |
| MBS | Double-X KNX | V1_00_00 – before V6_00_07 |
| MBS | Double-X LON | V1_00_00 – before V6_00_07 |
| MBS | Double-X M-Bus | V1_00_00 – before V6_00_07 |
| MBS | Double-X PROFINET | V1_00_00 – before V6_00_07 |
| MBS | Double-X x-link | V1_00_00 – before V6_00_07 |
| MBS | Triple-X KNX+DALI | V1_00_00 – before V6_00_07 |
| MBS | Triple-X KNX+LON | V1_00_00 – before V6_00_07 |
| MBS | Triple-X KNX+M-Bus | V1_00_00 – before V6_00_07 |
| MBS | Triple-X PROFINET+DALI | V1_00_00 – before V6_00_07 |
| MBS | Triple-X PROFINET+KNX | V1_00_00 – before V6_00_07 |
| MBS | Triple-X PROFINET+LON | V1_00_00 – before V6_00_07 |
| MBS | Triple-X PROFINET+M-Bus | V1_00_00 – before V6_00_07 |
Weakness: CWE-1393 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H