CVE-2025-8078

HIGH

7.2

CVSS Score

Published: October 21, 2025 at 01:49 AM UTC

Updated: October 18, 2026 at 09:10 PM UTC

9 products affected across 1 vendorZldUSG FLEXATP· also runs on 16 platforms

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Severity

HIGH7.2

Exploit prediction

EPSS 1%

SSVC

No known exploit

Description

A post-authentication command injection vulnerability in Zyxel ATP series firmware versions from V4.32 through V5.40, USG FLEX series firmware versions from V4.50 through V5.40, USG FLEX 50(W) series firmware versions from V4.16 through V5.40, and USG20(W)-VPN series firmware versions from V4.16 through V5.40 could allow an authenticated attacker with administrator privileges to execute operating system (OS) commands on the affected device by passing a crafted string as an argument to a CLI command.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Zld · Zyxel

95%

4.16 ≤ v < 5.414.32 ≤ v < 5.414.50 ≤ v < 5.41

zyxel-atp100 (environment) · zyxel-atp100w (environment) · zyxel-atp200 (environment) · zyxel-atp500 (environment) · zyxel-atp700 (environment) · zyxel-atp800 (environment) · zyxel-usg-20w-vpn (environment) · zyxel-usg-flex-100 (environment) · zyxel-usg-flex-100ax (environment) · zyxel-usg-flex-100w (environment) · zyxel-usg-flex-200 (environment) · zyxel-usg-flex-50 (environment) · zyxel-usg-flex-500 (environment) · zyxel-usg-flex-50ax (environment) · zyxel-usg-flex-50w (environment) · zyxel-usg-flex-700 (environment)

ATP · Zyxel

90%

USG FLEX · Zyxel

90%

USG20-VPN · Zyxel

60%

4.16 ≤ v ≤ 5.40

USG20W-VPN · Zyxel

60%

4.16 ≤ v ≤ 5.40

Usg Flex 50W Firmware · Zyxel

46%