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Fencer Intel
critical 9.8

CVE-2019-6563 json

Moxa IKS and EDS generate a predictable cookie calculated with an MD5 hash, allowing an attacker to capture the administrator's password, w…

published 2019-03-05 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-16122

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
0
none known

Summary

Moxa IKS and EDS generate a predictable cookie calculated with an MD5 hash, allowing an attacker to capture the administrator's password, which could lead to a full compromise of the device.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-19-057-01 updated cvss 9.8

Moxa IKS, EDS (Update A)

  • Moxa EDS-405A series <= 3.8 Moxa EDS-408A series <= 3.8 Moxa EDS-510A series <= 3.8 Moxa IKS-G6824A series <= 5.6
    affected: mitigation “Install firmware patch. Patches may be requested from Moxa Customer Service (login required):” moxa.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

1.75% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

  • ICS-CERT Moxa IKS, EDS

Classification

Weakness
  • CWE-341 Predictable from Observable State
  • CWE-916 Use of Password Hash With Insufficient Computational Effort

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.