CVE-2023-28771

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2023-28771
Improper error message handling in Zyxel ZyWALL/USG series firmware versions 4.60 through 4.73, VPN series firmware versions 4.60 through 5.35, USG FLEX series firmware versions 4.60 through 5.35, and ATP series firmware versions 4.60 through 5.35, which could allow an unauthenticated attacker to execute some OS commands remotely by sending crafted packets to an affected device.

9.8 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
http://packetstormsecurity.com/files/172820/Zyxel-IKE-Packet-Decoder-Unauthenticated-Remote-Code-Execution.html Exploit Third Party Advisory
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-remote-command-injection-vulnerability-of-firewalls Vendor Advisory
http://packetstormsecurity.com/files/172820/Zyxel-IKE-Packet-Decoder-Unauthenticated-Remote-Code-Execution.html Exploit Third Party Advisory
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-remote-command-injection-vulnerability-of-firewalls Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28771 US Government Resource
Configurations

Configuration 1 (hide)

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

Configuration 2 (hide)

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

Configuration 3 (hide)

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

Configuration 4 (hide)

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

Configuration 5 (hide)

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

Configuration 6 (hide)

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

Configuration 7 (hide)

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

Configuration 8 (hide)

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

Configuration 9 (hide)

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

Configuration 10 (hide)

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

Configuration 11 (hide)

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

Configuration 12 (hide)

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

Configuration 13 (hide)

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

Configuration 14 (hide)

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

Configuration 15 (hide)

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

Configuration 16 (hide)

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

Configuration 17 (hide)

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

Configuration 18 (hide)

AND
OR cpe:2.3:o:zyxel:zywall_usg_310_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:zywall_usg_310_firmware:4.73:-:*:*:*:*:*:*
cpe:2.3:h:zyxel:zywall_usg_310:-:*:*:*:*:*:*:*

Configuration 19 (hide)

AND
OR cpe:2.3:o:zyxel:zywall_usg_100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:zywall_usg_100_firmware:4.73:-:*:*:*:*:*:*
cpe:2.3:h:zyxel:zywall_usg_100:-:*:*:*:*:*:*:*
History

27 Oct 2025, 17:05

Type Values Removed Values Added
References () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28771 - () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28771 - US Government Resource

21 Oct 2025, 23:15

Type Values Removed Values Added
References
  • () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28771 -

21 Oct 2025, 20:19

Type Values Removed Values Added
References
  • {'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28771', 'source': '134c704f-9b21-4f2e-91b3-4a467353bcc0'}

21 Oct 2025, 19:20

Type Values Removed Values Added
References
  • () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28771 -

21 Nov 2024, 07:55

Type Values Removed Values Added
References () http://packetstormsecurity.com/files/172820/Zyxel-IKE-Packet-Decoder-Unauthenticated-Remote-Code-Execution.html - Exploit, Third Party Advisory () http://packetstormsecurity.com/files/172820/Zyxel-IKE-Packet-Decoder-Unauthenticated-Remote-Code-Execution.html - Exploit, Third Party Advisory
References () https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-remote-command-injection-vulnerability-of-firewalls - Vendor Advisory () https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-remote-command-injection-vulnerability-of-firewalls - Vendor Advisory

09 Jun 2023, 18:12

Type Values Removed Values Added
CPE cpe:2.3:o:zyxel:usg_flex_50_firmware:*:*:*:*:*:*:*:*
References (MISC) http://packetstormsecurity.com/files/172820/Zyxel-IKE-Packet-Decoder-Unauthenticated-Remote-Code-Execution.html - (MISC) http://packetstormsecurity.com/files/172820/Zyxel-IKE-Packet-Decoder-Unauthenticated-Remote-Code-Execution.html - Exploit, Third Party Advisory

09 Jun 2023, 17:15

Type Values Removed Values Added
References
  • (MISC) http://packetstormsecurity.com/files/172820/Zyxel-IKE-Packet-Decoder-Unauthenticated-Remote-Code-Execution.html -

07 Jun 2023, 18:20

Type Values Removed Values Added
CPE cpe:2.3:o:zyxel:usg_flex_50_firmware:*:*:*:*:*:*:*:*

04 May 2023, 18:46

Type Values Removed Values Added
References (CONFIRM) https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-remote-command-injection-vulnerability-of-firewalls - (CONFIRM) https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-remote-command-injection-vulnerability-of-firewalls - Vendor Advisory
CPE cpe:2.3:o:zyxel:usg_flex_100w_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:zywall_usg_100:-:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:atp100w_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:vpn300_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:zywall_usg_310_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:usg_flex_200:-:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:atp200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:usg_flex_100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:vpn50:-:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:zywall_usg_310:-:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:atp500:-:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:atp500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:usg_flex_700:-:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:usg_flex_50w:-:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:vpn300:-:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:usg_flex_500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:vpn100:-:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:zywall_usg_100_firmware:4.73:-:*:*:*:*:*:*
cpe:2.3:o:zyxel:atp800_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:atp800:-:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:usg_flex_50_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:atp100:-:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:usg_flex_50w_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:vpn1000:-:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:vpn50_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:atp700_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:atp100w:-:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:usg_flex_50:-:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:atp200:-:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:usg_flex_100:-:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:usg_flex_200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:atp700:-:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:vpn100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:zywall_usg_100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:usg_flex_700_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:usg_flex_500:-:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:vpn1000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:atp100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:usg_flex_100w:-:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:zywall_usg_310_firmware:4.73:-:*:*:*:*:*:*
CWE CWE-78
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 9.8

25 Apr 2023, 02:15

Type Values Removed Values Added
New CVE
Information

Published : 2023-04-25 02:15

Updated : 2025-10-27 17:05

NVD link : CVE-2023-28771

Mitre link : CVE-2023-28771

CVE.ORG link : CVE-2023-28771

JSON object : View

Products Affected

zyxel

  • usg_flex_100
  • atp700_firmware
  • vpn50_firmware
  • vpn100
  • atp200
  • atp100_firmware
  • vpn1000_firmware
  • zywall_usg_100
  • usg_flex_50_firmware
  • vpn300
  • usg_flex_200_firmware
  • usg_flex_700_firmware
  • usg_flex_50w_firmware
  • atp700
  • usg_flex_200
  • vpn1000
  • usg_flex_100w_firmware
  • vpn300_firmware
  • zywall_usg_310_firmware
  • usg_flex_100_firmware
  • atp100w
  • zywall_usg_310
  • vpn100_firmware
  • atp100w_firmware
  • usg_flex_100w
  • usg_flex_50w
  • atp500_firmware
  • atp800_firmware
  • usg_flex_50
  • usg_flex_500_firmware
  • usg_flex_500
  • atp800
  • zywall_usg_100_firmware
  • vpn50
  • atp500
  • atp200_firmware
  • atp100
  • usg_flex_700
CWE
CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')