The post-authentication command injection vulnerability in the CLI command of Zyxel ATP series firmware versions 4.32 through 5.35, USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W) firmware versions 4.16 through 5.35, USG20(W)-VPN firmware versions 4.16 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow an authenticated attacker to execute some OS commands remotely.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00971.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Zyxel ATP series firmware affected
Version Status Constraints
4.32 through 5.35 affected —
Zyxel USG FLEX series firmware affected
Version Status Constraints
4.50 through 5.35 affected —
Zyxel USG FLEX 50(W) firmware affected
Version Status Constraints
4.16 through 5.35 affected —
Zyxel USG20(W)-VPN firmware affected
Version Status Constraints
4.16 through 5.35 affected —
Zyxel VPN series firmware affected
Version Status Constraints
4.30 through 5.35 affected —

Configuration 1 [-]

AND
cpe:2.3:o:zyxel:atp200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:atp200:-:*:*:*:*:*:*:*

Configuration 2 [-]

AND
cpe:2.3:o:zyxel:atp100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:atp100:-:*:*:*:*:*:*:*

Configuration 3 [-]

AND
cpe:2.3:o:zyxel:atp700_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:atp700:-:*:*:*:*:*:*:*

Configuration 4 [-]

AND
cpe:2.3:o:zyxel:atp500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:atp500:-:*:*:*:*:*:*:*

Configuration 5 [-]

AND
cpe:2.3:o:zyxel:atp100w_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:atp100w:-:*:*:*:*:*:*:*

Configuration 6 [-]

AND
cpe:2.3:o:zyxel:atp800_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:atp800:-:*:*:*:*:*:*:*

Configuration 7 [-]

AND
cpe:2.3:o:zyxel:usg_flex_100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:usg_flex_100:-:*:*:*:*:*:*:*

Configuration 8 [-]

AND
cpe:2.3:o:zyxel:usg_flex_50_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:usg_flex_50:-:*:*:*:*:*:*:*

Configuration 9 [-]

AND
cpe:2.3:o:zyxel:usg_flex_200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:usg_flex_200:-:*:*:*:*:*:*:*

Configuration 10 [-]

AND
cpe:2.3:o:zyxel:usg_flex_500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:usg_flex_500:-:*:*:*:*:*:*:*

Configuration 11 [-]

AND
cpe:2.3:o:zyxel:usg_flex_700_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:usg_flex_700:-:*:*:*:*:*:*:*

Configuration 12 [-]

AND
cpe:2.3:o:zyxel:usg_flex_100w_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:usg_flex_100w:-:*:*:*:*:*:*:*

Configuration 13 [-]

AND
cpe:2.3:o:zyxel:usg_20w-vpn_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:usg_20w-vpn:-:*:*:*:*:*:*:*

Configuration 14 [-]

AND
cpe:2.3:o:zyxel:usg_flex_50w_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:usg_flex_50w:-:*:*:*:*:*:*:*

Configuration 15 [-]

AND
cpe:2.3:o:zyxel:usg20-vpn_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:usg20-vpn:-:*:*:*:*:*:*:*

Configuration 16 [-]

AND
cpe:2.3:o:zyxel:vpn100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:vpn100:-:*:*:*:*:*:*:*

Configuration 17 [-]

AND
cpe:2.3:o:zyxel:vpn1000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:vpn1000:-:*:*:*:*:*:*:*

Configuration 18 [-]

AND
cpe:2.3:o:zyxel:vpn300_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:vpn300:-:*:*:*:*:*:*:*

Configuration 19 [-]

AND
cpe:2.3:o:zyxel:vpn50_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:vpn50:-:*:*:*:*:*:*:*

No data.

No data.

Project Subscriptions

Vendors Products
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Atp200 Subscribe
Atp200 Firmware Subscribe
Atp500 Subscribe
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Atp700 Firmware Subscribe
Atp800 Subscribe
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Usg Flex 100 Subscribe
Usg Flex 100 Firmware Subscribe
Usg Flex 100w Subscribe
Usg Flex 100w Firmware Subscribe
Usg Flex 200 Subscribe
Usg Flex 200 Firmware Subscribe
Usg Flex 50 Subscribe
Usg Flex 500 Subscribe
Usg Flex 500 Firmware Subscribe
Usg Flex 50 Firmware Subscribe
Usg Flex 50w Subscribe
Usg Flex 50w Firmware Subscribe
Usg Flex 700 Subscribe
Usg Flex 700 Firmware Subscribe
Vpn100 Subscribe
Vpn1000 Subscribe
Vpn1000 Firmware Subscribe
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Vpn300 Subscribe
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Vpn50 Subscribe
Vpn50 Firmware Subscribe
Advisories
Source ID Title
EUVD EUVD EUVD-2023-31716 The post-authentication command injection vulnerability in the CLI command of Zyxel ATP series firmware versions 4.32 through 5.35, USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W) firmware versions 4.16 through 5.35, USG20(W)-VPN firmware versions 4.16 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow an authenticated attacker to execute some OS commands remotely.
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-xss-vulnerability-and-post-authentication-command-injection-vulnerability-in-firewalls cve-icon cve-icon
History

Tue, 04 Feb 2025 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Zyxel

Published:

Updated: 2025-02-04T16:47:55.646Z

Reserved: 2023-03-09T00:00:00.000Z

Link: CVE-2023-27991

cve-icon Vulnrichment

Updated: 2024-08-02T12:23:30.834Z

cve-icon NVD

Status : Modified

Published: 2023-04-24T18:15:09.497

Modified: 2024-11-21T07:53:53.360

Link: CVE-2023-27991

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses