Is CVE-2021-28911 in the CISA KEV catalog?

No. CVE-2021-28911 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-28911?

CVE-2021-28911 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2021-28911?

CVE-2021-28911 has an EPSS score of 1.60% (73th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-28911?

Upgrade eibport firmware to 3.9.1 or later.

CVE & CISA-KEV Catalog

CVE-2021-28911

CRITICALEPSS 73th pctl

9.8

CVSS v3

NVD

Description

BAB TECHNOLOGIE GmbH eibPort V3 prior version 3.9.1 allow unauthenticated attackers access to /tmp path which contains some sensitive data (e.g. device serial number). Having those info, a possible loginId can be self-calculated in a brute force attack against BMX interface. This is usable and part of an attack chain to gain SSH root access.

CWE-307 CWE-863Incorrect Authorization

How to fix

Remediation Available

eibport firmwareNVD

Affected:< 3.9.1Fixed in:3.9.1CVE-2021-28911derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.60%probability of exploitation in 30 days

73rdpercentile

Elevated risk: more likely to be exploited than 73% of all known CVEs.

References

Third-Party Advisory1

psytester.github.io

Embed a live status badge for CVE-2021-28911

Markdown

[![CVE-2021-28911](https://tridentstack.com/cve/badge/CVE-2021-28911.svg)](https://tridentstack.com/cve/CVE-2021-28911)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-28911"><img src="https://tridentstack.com/cve/badge/CVE-2021-28911.svg" alt="CVE-2021-28911"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.