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CVE-2021-28909

CRITICAL
9.8
CVSS Score
Published: September 9, 2021 at 05:35 PM UTC
Updated: June 17, 2026 at 03:47 AM UTC
2 products affected across 1 vendorEibport FirmwareEibport

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Severity
CRITICAL9.8
Exploit prediction
EPSS 1%

Description

BAB TECHNOLOGIE GmbH eibPort V3 prior version 3.9.1 allow unauthenticated attackers to access uncontrolled the login service at /webif/SecurityModule in a brute force attack. The password could be weak and default username is known as 'admin'. This is usable and part of an attack chain to gain SSH root access.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Eibport Firmware· Bab Technologie
95%
v < 3.9.1
Affected range stops below 3.9.1, so it looks safe — our inference, not a vendor statement
bab-technologie-eibport (same device)
Eibport· Bab Technologiedevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_MISCThird Party Advisory
Source: [email protected]
https://psytester.github.io/CVE-2021-28909

CVSS

9.8CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-307

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