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    CVE-2023-6399

    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:Feb 20, 2024
    Last Modified:Jan 21, 2025
    EPS:Feb 20, 2024
    EPSS Score:0.00306
    CVSS Score:5.7

    Affected Products

    Vendor
    Zyxel
    Product
    Atp100
    Vendor
    Zyxel
    Product
    Atp100 Firmware
    Vendor
    Zyxel
    Product
    Atp100w
    Vendor
    Zyxel
    Product
    Atp100w Firmware
    Vendor
    Zyxel
    Product
    Atp200
    Vendor
    Zyxel
    Product
    Atp200 Firmware
    Vendor
    Zyxel
    Product
    Atp500
    Vendor
    Zyxel
    Product
    Atp500 Firmware
    Vendor
    Zyxel
    Product
    Atp700
    Vendor
    Zyxel
    Product
    Atp700 Firmware
    Vendor
    Zyxel
    Product
    Atp800
    Vendor
    Zyxel
    Product
    Atp800 Firmware
    Vendor
    Zyxel
    Product
    Uos
    Vendor
    Zyxel
    Product
    Usg20-vpn
    Vendor
    Zyxel
    Product
    Usg20-vpn Firmware
    Vendor
    Zyxel
    Product
    Usg20w-vpn
    Vendor
    Zyxel
    Product
    Usg20w-vpn Firmware
    Vendor
    Zyxel
    Product
    Usg Flex 100
    Vendor
    Zyxel
    Product
    Usg Flex 100 Firmware
    Vendor
    Zyxel
    Product
    Usg Flex 100ax
    Vendor
    Zyxel
    Product
    Usg Flex 100ax Firmware
    Vendor
    Zyxel
    Product
    Usg Flex 100h
    Vendor
    Zyxel
    Product
    Usg Flex 100h Firmware
    Vendor
    Zyxel
    Product
    Usg Flex 100hp
    Vendor
    Zyxel
    Product
    Usg Flex 100w
    Vendor
    Zyxel
    Product
    Usg Flex 100w Firmware
    Vendor
    Zyxel
    Product
    Usg Flex 200
    Vendor
    Zyxel
    Product
    Usg Flex 200 Firmware
    Vendor
    Zyxel
    Product
    Usg Flex 200h
    Vendor
    Zyxel
    Product
    Usg Flex 200h Firmware
    Vendor
    Zyxel
    Product
    Usg Flex 200hp
    Vendor
    Zyxel
    Product
    Usg Flex 200hp Firmware
    Vendor
    Zyxel
    Product
    Usg Flex 50
    Vendor
    Zyxel
    Product
    Usg Flex 500
    Vendor
    Zyxel
    Product
    Usg Flex 500 Firmware
    Vendor
    Zyxel
    Product
    Usg Flex 500h
    Vendor
    Zyxel
    Product
    Usg Flex 500h Firmware
    Vendor
    Zyxel
    Product
    Usg Flex 50 Firmware
    Vendor
    Zyxel
    Product
    Usg Flex 50w
    Vendor
    Zyxel
    Product
    Usg Flex 50w Firmware
    Vendor
    Zyxel
    Product
    Usg Flex 700
    Vendor
    Zyxel
    Product
    Usg Flex 700 Firmware
    Vendor
    Zyxel
    Product
    Usg Flex 700h
    Vendor
    Zyxel
    Product
    Usg Flex 700h Firmware

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-135 Format String Injection
    CAPEC-67 String Format Overflow in syslog()

    Related CVEs

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    CVE-2025-8078 (CVSS 7.2) — A post-authentication command injection vulnerability in Zyxel ATP series firmware versions from V4.32 through…
    CVE-2024-11667 (CVSS 7.5) — A directory traversal vulnerability in the web management interface of Zyxel ATP series firmware versions V5.0…
    CVE-2024-42061 (CVSS 6.1) — A reflected cross-site scripting (XSS) vulnerability in the CGI program "dynamic_script.cgi" of Zyxel ATP seri…
    CVE-2024-42060 (CVSS 7.2) — A post-authentication command injection vulnerability in Zyxel ATP series firmware versions from V4.32 through…
    CVE-2024-42059 (CVSS 7.2) — A post-authentication command injection vulnerability in Zyxel ATP series firmware versions from V5.00 through…
    CVE-2024-42058 (CVSS 7.5) — A null pointer dereference vulnerability in Zyxel ATP series firmware versions from V4.32 through V5.38, USG F…
    CVE-2024-42057 (CVSS 8.1) — A command injection vulnerability in the IPSec VPN feature of Zyxel ATP series firmware versions from V4.32 th…
    CVE-2024-7203 (CVSS 7.2) — A post-authentication command injection vulnerability in Zyxel ATP series firmware versions from V4.60 through…
    CVE-2024-6343 (CVSS 4.9) — A buffer overflow vulnerability in the CGI program of Zyxel ATP series firmware versions from V4.32 through V5…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High