CVE-2018-5399

CRITICALNVD 9.49.8▲
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-13. NVD baseline CVSS 9.4; sources differ by 0.4.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.4
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 9.4Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

The Auto-Maskin DCU 210E firmware contains an undocumented Dropbear SSH server, v2015.55, configured to listen on Port 22 while the DCU is running. The Dropbear server is configured with a hard-coded user name and password combination of root / amroot. The server is configured to use password only authentication not cryptographic keys, however the firmware image contains an RSA host-key for the server. An attacker can exploit this vulnerability to gain root access to the Angstrom Linux operating system and modify any binaries or configuration files in the firmware. Affected releases are Auto-Maskin DCU-210E RP-210E: Versions prior to 3.7 on ARMv7.

CVSS v3
9.4
EG Score
9.8(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
79.7%
KEV
Not listed

Published

October 8, 2018

Last Modified

November 21, 2024

Advisory Details (1)

Auto-updated Jul 15, 2026
No patch confirmed yet. Sources: cert.
cert

VU#176301 - Auto-Maskin DCU 210E RP 210E and Marine Pro Observer App

https://www.kb.cert.org/vuls/id/176301

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 44× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 01:36 UTCEG score recompute
  2. 2026-07-22 22:17 UTCEG score recompute
  3. 2026-07-22 14:05 UTCEPSS rescore
  4. 2026-07-21 15:22 UTCEPSS rescore
  5. 2026-07-20 17:04 UTCEPSS rescore
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  1. 2026-07-05 02:27 UTCEPSS rescore
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  24. 2026-06-19 19:23 UTCEPSS rescore
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  26. 2026-06-18 17:50 UTCEPSS rescore
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  37. 2026-06-11 13:57 UTCEPSS rescore
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  40. 2026-06-08 14:14 UTCEPSS rescore
  41. 2026-06-07 15:22 UTCEPSS rescore
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  43. 2026-06-06 13:45 UTCEPSS rescore
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  45. 2026-06-05 22:45 UTCEPSS rescore
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  51. 2026-05-31 22:29 UTCEPSS rescore
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  55. 2026-05-29 13:41 UTCEPSS rescore
  56. 2026-05-28 13:43 UTCEPSS rescore
  57. 2026-05-28 13:42 UTCEPSS rescore
  58. 2026-05-28 02:24 UTCEG score recompute
  59. 2026-05-28 02:24 UTCGHSA enrichment
  60. 2026-05-27 13:38 UTCEPSS rescore
  61. 2026-05-26 13:42 UTCEPSS rescore
  62. 2026-05-26 13:42 UTCEPSS rescore
  63. 2026-05-26 07:17 UTCEPSS rescore
  64. 2026-05-26 07:17 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2018-5399?
CVE-2018-5399 is a critical vulnerability published on October 8, 2018. The Auto-Maskin DCU 210E firmware contains an undocumented Dropbear SSH server, v2015.55, configured to listen on Port 22 while the DCU is running. The Dropbear server is configured with a hard-coded user name and password combination of root / amroot. The server is configured to use password only…
When was CVE-2018-5399 disclosed?
CVE-2018-5399 was first published in the National Vulnerability Database on October 8, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-5399 actively exploited?
CVE-2018-5399 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 79.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2018-5399?
CVE-2018-5399 has a CVSS v3 base score of 9.4 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.8.
How do I remediate CVE-2018-5399?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-5399, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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