CVE-2019-12583

Uag2100 Firmware vulnerability

CVSS

9.1

EPSS

43.9%

EPSS pct

99th

Exploited

No known

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.

Affected vendor

Zyxel

Affected product

Uag2100 Firmware

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Weakness type (CWE)

CWE-425 — Direct Request (Forced Browsing)

Published

2019-06-27

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to integrity, high impact to availability.

Its EPSS score of 43.9% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it among the most exploited CVEs currently tracked.

Check your external exposure to CVE-2019-12583

Confirm whether Zyxel Uag2100 Firmware is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2019-12583.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-12583

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-12583 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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