Home/CVE/Missing Access Control in the "Free Time" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attack
CVE

CVE-2019-12583

Missing Access Control in the "Free Time" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attack

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.

CRITICAL · CVSS 9.1 EPSS 0.59063
Act now
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 2% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-425Direct Request ('Forced Browsing')
▤

Affected Products & Versions

14
zyxel uag2100 firmware<= 4.18\(aaiz.1\)c0
zyxel uag4100 firmware<= 4.18\(aatd.1\)c0
zyxel uag5100 firmware<= 4.18\(aapn.1\)c0
zyxel usg110 firmware<= 4.33\(aaph.0\)c0
zyxel usg210 firmware<= 4.33\(aapi.0\)c0
zyxel usg310 firmware<= 4.33\(aapj.0\)c0
zyxel usg1100 firmware<= 4.33\(aapk.0\)c0
zyxel usg1900 firmware<= 4.33\(aapl.0\)c0
⚠

Public Exploits & PoCs

2
nucleiZyxel ZyWall UAG/USG - Account Creation Accesscritical
pocn-thumann.de · zyxel-gateways-missing-access-control-in-account-generato...n-thumann.de
▣

Scoring & Timeline

9.1
CRITICAL · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD27 Jun 2019 · 02:15 PM
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtmlPatchVendor Advisory
Intelligence Graph · click any node to traverse
CVETechnique ActorTool Family
drag to reposition · click any node to traverse · button top-right enlarges
External lookups - second-class, for what we don’t hold ourselves
NVDCVE.orgCISAVulnersExploit-DBGitHub PoCVulnCheck KEVGreyNoise
Vulnerabilities
CISA KEV catalog
CWE weaknesses
CAPEC attack patterns
Package vulnerabilities
Threat intelligence
Threat actors
Tools & malware
ATT&CK techniques
IOCs
Detection & defense
Sigma rules
YARA rules
Atomic Red Team tests
D3FEND countermeasures
Compliance
NIST 800-53
ISO 27001:2022
SOC 2 TSC
PCI-DSS v4.0
CIS Controls v8.1
About
All capabilities
Live statistics
Data sources
Privacy policy
Terms of service
threatengine.sh  ·  Open-source threat intelligence platform  ·  100+ authoritative sources  ·  Every fact traces to its origin