Improper access control in ICS-CERT Moxa IKS, EDS
Priority LOW 36CWE-284Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-284.
Summary
Moxa IKS and EDS does not properly check authority on server side, which results in a read-only user being able to perform arbitrary configuration changes.
Why it matters now
EPSS 0.01665 76th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| ICS-CERT | Moxa IKS, EDS | IKS-G6824A series Versions 4.5 and prior, EDS-405A series Version 3.8 and prior, EDS-408A series Version 3.8 and prior, and EDS-510A series Version 3.8 and prior | — | No fix listed | CNA |
- Moxa IKS, EDS VendorICS-CERT Affected IKS-G6824A series Versions 4.5 and prior, EDS-405A series Version 3.8 and prior, EDS-408A series Version 3.8 and prior, and EDS-510A series Version 3.8 and prior Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:moxa:iks-g6824a_firmware:*:*:*:*:*:*:*:* | up to 4.5 | Vulnerable | Moxa |
| cpe:2.3:h:moxa:iks-g6824a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Moxa |
| cpe:2.3:o:moxa:eds-405a_firmware:*:*:*:*:*:*:*:* | up to 3.8 | Vulnerable | Moxa |
| cpe:2.3:h:moxa:eds-405a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Moxa |
| cpe:2.3:o:moxa:eds-408a_firmware:*:*:*:*:*:*:*:* | up to 3.8 | Vulnerable | Moxa |
| cpe:2.3:h:moxa:eds-408a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Moxa |
| cpe:2.3:o:moxa:eds-510a_firmware:*:*:*:*:*:*:*:* | up to 3.8 | Vulnerable | Moxa |
| cpe:2.3:h:moxa:eds-510a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Moxa |
- cpe:2.3:o:moxa:iks-g6824a_firmware:*:*:*:*:*:*:*:* Versions up to 4.5 Vulnerable ·Moxa
- cpe:2.3:h:moxa:iks-g6824a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Moxa
- cpe:2.3:o:moxa:eds-405a_firmware:*:*:*:*:*:*:*:* Versions up to 3.8 Vulnerable ·Moxa
- cpe:2.3:h:moxa:eds-405a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Moxa
- cpe:2.3:o:moxa:eds-408a_firmware:*:*:*:*:*:*:*:* Versions up to 3.8 Vulnerable ·Moxa
- cpe:2.3:h:moxa:eds-408a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Moxa
- cpe:2.3:o:moxa:eds-510a_firmware:*:*:*:*:*:*:*:* Versions up to 3.8 Vulnerable ·Moxa
- cpe:2.3:h:moxa:eds-510a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Moxa
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-6520
- 2026-10-03 Alias added: GHSA-5m99-qg5r-pvv8
References
More Moxa Eds-405a Firmware vulnerabilities
- TI-2019-04611 Several buffer overflow vulnerabilities have been identified in Moxa IKS and EDS, which may allow remote code execution. CVSS 3.1CRITICAL 9.8
- TI-2019-04578 Missing brute-force protection in ICS-CERT Moxa IKS, EDS CVSS 3.1CRITICAL 9.8
- TI-2019-04617 Moxa IKS and EDS generate a predictable cookie calculated with an MD5 hash, allowing an… CVSS 3.1CRITICAL 9.8
- TI-2019-04580 Cleartext transmission of sensitive information in Moxa IKS, EDS CVSS 3.1CRITICAL 9.8
- TI-2019-04576 Out-of-bounds read in ICS-CERT Moxa IKS, EDS CVSS 3.1CRITICAL 9.1
- TI-2015-05427 The administrative web interface on Moxa EDS-405A and EDS-408A switches with firmware… CVSS 2.0HIGH 8.5
Sources
- CVE-2019-6520 · CVE Program
- CVE-2019-6520 · NVD
- FIRST EPSS
- GHSA-5m99-qg5r-pvv8 · GitHub Advisory Database · CC BY 4.0
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