diff --git a/2023/33xxx/CVE-2023-33009.json b/2023/33xxx/CVE-2023-33009.json
index 16fa339729e..22f7a8637e2 100644
--- a/2023/33xxx/CVE-2023-33009.json
+++ b/2023/33xxx/CVE-2023-33009.json
@@ -3,16 +3,116 @@
     "data_format": "MITRE",
     "data_version": "4.0",
     "CVE_data_meta": {
-        "ID": "CVE-2023-33009",
-        "ASSIGNER": "cve@mitre.org",
-        "STATE": "RESERVED"
+        "ASSIGNER": "PSIRT@zyxel.com.tw",
+        "ID": "CVE-2023-33009"
+    },
+    "affects": {
+        "vendor": {
+            "vendor_data": [
+                {
+                    "vendor_name": "Zyxel",
+                    "product": {
+                        "product_data": [
+							{
+                                "product_name": "ATP series firmware",
+                                "version": {
+                                    "version_data": [
+                                        {
+                                            "version_value": "4.32 through 5.36 Patch 1"
+                                        }
+                                    ]
+                                }
+                            },
+							{
+                                "product_name": "USG FLEX series firmware",
+                                "version": {
+                                    "version_data": [
+                                        {
+                                            "version_value": "4.50 through 5.36 Patch 1"
+                                        }
+                                    ]
+                                }
+                            },
+							{
+                                "product_name": "USG FLEX 50(W) firmware",
+                                "version": {
+                                    "version_data": [
+                                        {
+                                            "version_value": "4.25 through 5.36 Patch 1"
+                                        }
+                                    ]
+                                }
+                            },
+							{
+                                "product_name": "USG20(W)-VPN firmware",
+                                "version": {
+                                    "version_data": [
+                                        {
+                                            "version_value": "4.25 through 5.36 Patch 1"
+                                        }
+                                    ]
+                                }
+                            },
+							{
+                                "product_name": "VPN series firmware",
+                                "version": {
+                                    "version_data": [
+                                        {
+                                            "version_value": "4.30 through 5.36 Patch 1"
+                                        }
+                                    ]
+                                }
+                            },
+							{
+                                "product_name": "ZyWALL/USG series firmware",
+                                "version": {
+                                    "version_data": [
+                                        {
+                                            "version_value": "4.25 through 4.73 Patch 1"
+                                        }
+                                    ]
+                                }
+                            }
+						]
+                    }
+                }
+            ]
+        }
+    },
+    "problemtype": {
+        "problemtype_data": [
+            {
+                "description": [
+                    {
+                        "lang": "eng",
+                        "value": "CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"
+                    }
+                ]
+            }
+        ]
+    },
+    "references": {
+        "reference_data": [
+            {
+                "refsource": "CONFIRM",
+                "name": "https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-buffer-overflow-vulnerabilities-of-firewalls",
+                "url": "https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-buffer-overflow-vulnerabilities-of-firewalls"
+            }
+        ]
+    },
+    "impact": {
+        "cvss": {
+            "baseScore": "9.8",
+            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
+            "version": "3.1"
+        }
     },
     "description": {
         "description_data": [
             {
                 "lang": "eng",
-                "value": "** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided."
+                "value": "A buffer overflow vulnerability in the notification 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."
             }
         ]
     }
-}
\ No newline at end of file
+}