Cyber Resilience

CVE-2023-34138

High

Published: 17 July 2023

Published
17 July 2023
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 8.0 CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score 0.0013 32.2th percentile
Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2023-34138 is a high-severity OS Command Injection (CWE-78) vulnerability in Zyxel Usg 20W-Vpn Firmware. Its CVSS base score is 8.0 (High).

Operationally, ranked at the 32.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

A command injection vulnerability in the hotspot management feature of the Zyxel ATP series firmware versions 4.60 through 5.36 Patch 2, USG FLEX series firmware versions 4.60 through 5.36 Patch 2, USG FLEX 50(W) series firmware versions 4.60 through 5.36…

more

Patch 2, USG20(W)-VPN series firmware versions 4.60 through 5.36 Patch 2, and VPN series firmware versions 4.60 through 5.36 Patch 2, could allow an unauthenticated, LAN-based attacker to execute some OS commands on an affected device if the attacker could trick an authorized administrator to add their IP address to the list of trusted RADIUS clients in advance.

CWE(s)
CWE-78

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

zyxel
usg 20w-vpn firmware
4.60 — 5.37
zyxel
usg 2200-vpn firmware
4.60 — 5.37
zyxel
usg flex 100 firmware
4.60 — 5.37
zyxel
usg flex 100w firmware
4.60 — 5.37
zyxel
usg flex 200 firmware
4.60 — 5.37
zyxel
usg flex 50 firmware
4.60 — 5.37
zyxel
usg flex 500 firmware
4.60 — 5.37
zyxel
usg flex 50w firmware
4.60 — 5.37
zyxel
usg flex 700 firmware
4.60 — 5.37
zyxel
zywall atp100 firmware
4.60 — 5.37
+12 more product configuration(s) — see NVD for full list

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

References