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Eds 405A Firmware CVE-2019-6524

CRITICAL
Improper Restriction of Excessive Authentication Attempts (CWE-307)
2019-03-05 ics-cert@hq.dhs.gov
Information Disclosure Eds 405A Firmware Eds 408A Firmware Iks G6824A Firmware Eds 510A Firmware Moxa
9.8
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
CWE-307
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Brute-force prevention, rate limiting
Impact

CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system.
Act Now Prioritize within 24-48h. Why: CRITICAL severity.
No patch listed yet 2.7% exploitation probability (EPSS)

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AnalysisAI

Moxa IKS and EDS do not implement sufficient measures to prevent multiple failed authentication attempts, which may allow an attacker to discover passwords via brute force attack. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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Technical ContextAI · show details

This vulnerability is classified under CWE-307. Moxa IKS and EDS do not implement sufficient measures to prevent multiple failed authentication attempts, which may allow an attacker to discover passwords via brute force attack. Affected products include: Moxa Iks-G6824A Firmware, Moxa Eds-405A Firmware, Moxa Eds-408A Firmware, Moxa Eds-510A Firmware.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

DescriptionNVD

Moxa IKS and EDS do not implement sufficient measures to prevent multiple failed authentication attempts, which may allow an attacker to discover passwords via brute force attack.

Threat Intelligence Overview

EPSS Score
2.7%
Top 16% exploitable
Data Quality
2 sources
Confidence: Low
NVD CVE.org EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 2.7%
Patch available No
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

52
Low Medium High Critical
KEV: 0
EPSS: +3
CVSS: +49
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)NVD

cpe:2.3:o:moxa:iks-g6824a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:moxa:eds-405a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:moxa:eds-408a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:moxa:eds-510a_firmware:*:*:*:*:*:*:*:*

More in Eds 405A Firmware

View all
CVE-2019-6526 CRITICAL
9.8 Apr 15

Moxa IKS-G6824A series Versions 4.5 and prior, EDS-405A series Version 3.8 and prior, EDS-408A series Version 3.8 and pr
CVE-2019-6563 CRITICAL
9.8 Mar 05

Moxa IKS and EDS generate a predictable cookie calculated with an MD5 hash, allowing an attacker to capture the administ
CVE-2019-6557 CRITICAL
9.8 Mar 05

Several buffer overflow vulnerabilities have been identified in Moxa IKS and EDS, which may allow remote code execution.
CVE-2019-6522 CRITICAL
9.1 Mar 05

Moxa IKS and EDS fails to properly check array bounds which may allow an attacker to read device memory on arbitrary add
CVE-2019-6561 HIGH
8.8 Mar 05

Cross-site request forgery has been identified in Moxa IKS and EDS, which may allow for the execution of unauthorized ac
CVE-2015-6464 HIGH
8.5 Sep 11

The administrative web interface on Moxa EDS-405A and EDS-408A switches with firmware before 3.6 allows remote authentic
CVE-2019-6520 HIGH
7.5 Mar 05

Moxa IKS and EDS does not properly check authority on server side, which results in a read-only user being able to perfo
CVE-2019-6518 HIGH
7.5 Mar 05

Moxa IKS and EDS store plaintext passwords, which may allow sensitive information to be read by someone with access to t
CVE-2015-6465 MEDIUM
6.8 Sep 11

The GoAhead web server on Moxa EDS-405A and EDS-408A switches with firmware before 3.6 allows remote authenticated users
CVE-2019-6559 MEDIUM
6.5 Mar 05

Moxa IKS and EDS allow remote authenticated users to cause a denial of service via a specially crafted packet, which may
CVE-2019-6565 MEDIUM
6.1 Mar 05

Moxa IKS and EDS fails to properly validate user input, giving unauthenticated and authenticated attackers the ability t
CVE-2015-6466 MEDIUM
4.3 Sep 11

Cross-site scripting (XSS) vulnerability in the Diagnosis Ping feature in the administrative web interface on Moxa EDS-4

Same weakness CWE-307 – Improper Restriction of Excessive Authentication Attempts

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Same technique Information Disclosure

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CVE-2019-2725 CRITICAL POC
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CVE-2021-34523 CRITICAL POC
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CVE-2013-2251 CRITICAL POC
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CVE-2017-5638 CRITICAL POC
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CVE-2025-24813 CRITICAL POC
9.8
CVE-2025-68613 HIGH POC
8.8
CVE-2015-1701 HIGH POC
7.8
CVE-2017-0147 HIGH POC
7.5

References

Advisories & patches
REF http://www.securityfocus.com/bid/107178 REF https://ics-cert.us-cert.gov/advisories/ICSA-19-057-01

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