CVE-2019-12583

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-24. NVD baseline CVSS 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 44%CVSS: 9.1Exploit: Elevated riskExposed: 0

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

Missing Access Control in the "Free Time" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attacker to generate guest accounts by directly accessing the account generator. This can lead to unauthorised network access or Denial of Service.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
63(Track*)
EG Risk 63/100SSVC: 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
Severity91% × 45%
Exploitation44% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
44%
EPSS %ILE
99%
KEV
Not listed

Published

June 27, 2019

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated Jul 20, 2026
No patch confirmed yet.
generic

Support Download Page Redirect

https://www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtml
generic

Zyxel Gateways: Missing Access Control in Account Generator & XSS

https://n-thumann.de/blog/zyxel-gateways-missing-access-control-in-account-generator-xss/

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 23× 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.

Showing the most recent 100 of 109 total refreshes for this CVE.

  1. 2026-09-18 19:22 UTCEPSS rescore
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  1. 2026-08-17 13:43 UTCEPSS rescore
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  19. 2026-07-23 01:39 UTCEG score recompute
  20. 2026-07-22 22:19 UTCEG score recompute
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  25. 2026-07-19 14:28 UTCEPSS rescore
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  46. 2026-06-29 14:03 UTCEPSS rescore
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  62. 2026-06-13 22:58 UTCEPSS rescore
  63. 2026-06-12 23:09 UTCEPSS rescore
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  74. 2026-06-02 20:11 UTCEPSS rescore
  75. 2026-06-01 13:50 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2019/CVE-2019-12583.yaml
    First seen Jan 1, 2019

    Zyxel ZyWall UAG/USG - Account Creation Access

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2019-12583?
CVE-2019-12583 is a critical vulnerability published on June 27, 2019. Missing Access Control in the "Free Time" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attacker to generate guest accounts by directly accessing the account generator. This can lead to unauthorised network access or Denial of Service.
When was CVE-2019-12583 disclosed?
CVE-2019-12583 was first published in the National Vulnerability Database on June 27, 2019, 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-2019-12583 actively exploited?
CVE-2019-12583 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 44% probability of exploitation in the next 30 days, which ranks it in the top 1.3% of all scored CVEs.
What is the CVSS score of CVE-2019-12583?
CVE-2019-12583 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2019-12583?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-12583, 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.

Dependency Blast Radius

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