CVE-2021-28912Network attack vector

Root SSH access via hard-coded device passphrase

Published Sep 9, 2021 · Updated Aug 3, 2024

Hard-coded credentials in BAB TECHNOLOGIE eibPort V3 3.8.3 and earlier allow remote authenticated users to gain root SSH access. During production, each device receives a unique but weak, immutable “eibPort string” as the root SSH key passphrase. Network access, prior high-privilege authentication, user interaction, and the preceding attack-chain steps are required; successful use grants full control of the device.

CVSS severity7.2
High
EPSS probability1.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded credentials in BAB TECHNOLOGIE eibPort V3 3.8.3 and earlier allow remote authenticated users to gain root SSH access. During production, each device receives a unique but weak, immutable “eibPort string” as the root SSH key passphrase. Network access, prior high-privilege authentication, user interaction, and the preceding attack-chain steps are required; successful use grants full control of the device.

The record

CVE
CVE-2021-28912
Published
Sep 9, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-798, CWE-521, T1078.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 9, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.0NIST NVDAV:N/AC:L/Au:S/C:C/I:C/A:C
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
CWE-521Weak Password Requirements
T1078.003Valid Accounts: Local Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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