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cpe:2.3:o:zyxel:usg20-vpn_firmware:*:*:*:*:*:*:*:*

part: o version: * update: *

VendorZyxel (d3fcf896-5708-55f8-8f74-3e19a9d55b89)
ProductUsg20 Vpn Firmware (a7f16644-079b-5147-b380-2a5887d97bd9)
Edition*
Language*
Software edition*
Target software*
Target hardware*
Other*
NotesImported from gcve-enriched-dumps CVE data

PURL mappings

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Vulnerability references

IdentifiercpeApplicabilitySubmitteddb.gcve.eu detailsRationale
CVE:CVE-2023-6764 vulnerable 2026-06-08 06:21:55.759355 Details available
HIGH (8.1)
A format string vulnerability in a function of the IPSec VPN feature 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 versions from 4.16 through 5.37 Patch 1, and USG20(W)-VPN series firmware versions from 4.16 through 5.37 Patch 1 could allow an attacker to achieve unauthorized remote code execution by sending a sequence of specially crafted payloads containing an invalid pointer; however, such an attack would require detailed knowledge of an affected device’s memory layout and configuration.
Published: 2024-02-20T02:14:09.814Z
Updated: 2024-08-02T08:42:07.430Z
Reference links
Imported from gcve-enriched-dumps CVE data
CVE:CVE-2023-6399 vulnerable 2026-06-08 06:19:47.207408 Details available
MEDIUM (5.7)
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 versions from 4.16 through 5.37 Patch 1, USG20(W)-VPN series firmware versions from 4.16 through 5.37 Patch 1, and USG FLEX H series firmware versions from 1.10 through 1.10 Patch 1 could allow an authenticated IPSec VPN user to cause DoS conditions against the “deviceid” daemon by sending a crafted hostname to an affected device if it has the “Device Insight” feature enabled.
Published: 2024-02-20T01:42:21.027Z
Updated: 2024-08-02T08:28:21.797Z
Reference links
Imported from gcve-enriched-dumps CVE data
CVE:CVE-2023-6398 vulnerable 2026-06-08 06:19:47.186630 Details available
HIGH (7.2)
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 through 5.37 Patch 1, USG FLEX 50(W) series firmware versions from 4.16 through 5.37 Patch 1, USG20(W)-VPN series firmware versions from 4.16 through 5.37 Patch 1, USG FLEX H series firmware versions from 1.10 through 1.10 Patch 1, NWA50AX firmware versions through 6.29(ABYW.3), WAC500 firmware versions through 6.65(ABVS.1), WAX300H firmware versions through 6.60(ACHF.1), and WBE660S firmware versions through 6.65(ACGG.1) could allow an authenticated attacker with administrator privileges to execute some operating system (OS) commands on an affected device via FTP.
Published: 2024-02-20T01:34:32.229Z
Updated: 2024-08-25T15:46:49.897Z
Reference links
Imported from gcve-enriched-dumps CVE data
CVE:CVE-2023-33010 vulnerable 2026-06-08 06:04:48.254569 Details available
CRITICAL (9.8)
A buffer overflow vulnerability in the ID processing function in Zyxel ATP series firmware versions 4.32 through 5.36 Patch 1, USG FLEX series firmware versions 4.50 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.25 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.25 through 5.36 Patch 1, VPN series firmware versions 4.30 through 5.36 Patch 1, ZyWALL/USG series firmware versions 4.25 through 4.73 Patch 1, could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and even a remote code execution on an affected device.
Published: 2023-05-24T00:00:00.000Z
Updated: 2025-10-21T23:05:47.497Z
Reference links
Imported from gcve-enriched-dumps CVE data
CVE:CVE-2023-33009 vulnerable 2026-06-08 06:04:48.229440 Details available
CRITICAL (9.8)
A buffer overflow vulnerability in the notification function in Zyxel ATP series firmware versions 4.60 through 5.36 Patch 1, USG FLEX series firmware versions 4.60 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.60 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.60 through 5.36 Patch 1, VPN series firmware versions 4.60 through 5.36 Patch 1, ZyWALL/USG series firmware versions 4.60 through 4.73 Patch 1, could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and even a remote code execution on an affected device.
Published: 2023-05-24T00:00:00.000Z
Updated: 2025-10-21T23:05:47.636Z
Reference links
Imported from gcve-enriched-dumps CVE data
CVE:CVE-2023-27991 vulnerable 2026-06-08 05:57:42.731317 db.gcve.eu details were skipped to keep the page responsive. Imported from gcve-enriched-dumps CVE data
CVE:CVE-2023-27990 vulnerable 2026-06-08 05:57:42.723875 db.gcve.eu details were skipped to keep the page responsive. Imported from gcve-enriched-dumps CVE data
CVE:CVE-2023-22918 vulnerable 2026-06-08 05:54:27.400476 db.gcve.eu details were skipped to keep the page responsive. Imported from gcve-enriched-dumps CVE data
CVE:CVE-2022-38547 vulnerable 2026-06-08 05:47:16.633200 db.gcve.eu details were skipped to keep the page responsive. Imported from gcve-enriched-dumps CVE data
CVE:CVE-2022-30526 vulnerable 2026-06-08 05:43:38.170185 db.gcve.eu details were skipped to keep the page responsive. Imported from gcve-enriched-dumps CVE data
CVE:CVE-2022-2030 vulnerable 2026-06-08 05:42:50.106300 db.gcve.eu details were skipped to keep the page responsive. Imported from gcve-enriched-dumps CVE data
CVE:CVE-2021-35029 vulnerable 2026-06-08 05:32:17.439062 db.gcve.eu details were skipped to keep the page responsive. Imported from gcve-enriched-dumps CVE data
CVE:CVE-2020-9054 vulnerable 2026-06-08 05:27:20.394031 db.gcve.eu details were skipped to keep the page responsive. Imported from gcve-enriched-dumps CVE data

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