Zyxel Uos vulnerabilities

5 CVEs affecting Zyxel Uos, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2025-1732, published 2025-04-22.

Highest priority

Known exploited (CISA KEV) first, then by EPSS exploit probability.

CVE-2023-6398, published 2024-02-20. High severity, CVSS 7.2. EPSS: 1.3% chance of exploitation in the next 30 days. A post-authentication command injection vulnerability in the file upload binary in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50…
CVE-2025-1731, published 2025-04-22. High severity, CVSS 7.8. EPSS: 0.9% chance of exploitation in the next 30 days. An incorrect permission assignment vulnerability in the PostgreSQL commands of the Zyxel USG FLEX H series uOS firmware versions from V1.20 through V1.31 could allow an authenticated local attacker…
CVE-2023-6399, published 2024-02-20. Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days. A format string vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50(W) series firmware…
CVE-2025-1732, published 2025-04-22. Medium severity, CVSS 6.7. EPSS: 0.2% chance of exploitation in the next 30 days. An improper privilege management vulnerability in the recovery function of the Zyxel USG FLEX H series uOS firmware version V1.31 and earlier could allow an authenticated local attacker with…
CVE-2024-9677, published 2024-10-22. High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days. The insufficiently protected credentials vulnerability in the CLI command of the USG FLEX H series uOS firmware version V1.21 and earlier versions could allow an authenticated local attacker to gain…