{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-102758",
        "assignerOrgId": "e51fbebd-6053-4e49-959f-1b94eeb69a2c",
        "state": "PUBLISHED",
        "assignerShortName": "eclipse",
        "dateReserved": "2026-09-29T16:21:58.057Z",
        "datePublished": "2026-09-29T17:26:44.424Z",
        "dateUpdated": "2026-09-30T20:42:39.497Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "e51fbebd-6053-4e49-959f-1b94eeb69a2c",
                "shortName": "eclipse",
                "dateUpdated": "2026-09-29T17:26:44.424Z"
            },
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-126",
                            "description": "CWE-126 Buffer Over-read",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "Eclipse Foundation",
                    "product": "NetX Duo",
                    "packageName": "NetX Duo",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThanOrEqual": "6.5.1.202602",
                            "versionType": "custom"
                        },
                        {
                            "status": "unaffected",
                            "version": "6.5.2.202603"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "The `_nx_secure_x509_asn1_tlv_block_parse()` function parses ASN.1 TLV (tag-length-value) blocks out of DER-encoded data. It is the primitive underneath all X.509 certificate parsing in NetX Secure, and therefore runs on certificates supplied by a remote peer during the TLS handshake.\n\n\n\nThe function reads the one-byte ASN.1 tag from the caller's buffer *before* checking that the buffer holds at least one byte. When a caller passes a remaining length of zero, the guard correctly returns `NX_SECURE_X509_ASN1_LENGTH_TOO_LONG`, but the read has already happened one byte past the end of the buffer.\n\n\n\ncode:\n\n\n\nnx_secure/src/nx_secure_x509_asn1_tlv_block_parse.c\n\n\n\n```\n\n\n\nUINT _nx_secure_x509_asn1_tlv_block_parse(const UCHAR *buffer, ULONG *buffer_length, USHORT *tlv_type,\n\n                                          USHORT *tlv_tag_class, ULONG *tlv_length,\n                                          const UCHAR **tlv_data, ULONG *header_length)\n\n\n{\n\n\n\nUINT   current_index;\n\n\n\nUSHORT current_tag;\n\n\n\nULONG  length;\n\n\n\nULONG  length_bytes;\n\n    current_index = 0;\n    current_tag = buffer[current_index];      /* <-- read before the bounds check */\n    if (*buffer_length < 1)\n    {\n        return(NX_SECURE_X509_ASN1_LENGTH_TOO_LONG);\n    }\n\n\n```\n\n\n\nThe remainder of the function is correctly ordered. The multi-byte length path is guarded by `length_bytes > 4 || length_bytes > *buffer_length` before its read loop, the decoded value is checked against `length > *buffer_length`, and the second single-byte length read follows its own `*buffer_length < 1` guard. The tag read is the only load placed ahead of its check.",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "<p>The `_nx_secure_x509_asn1_tlv_block_parse()` function parses ASN.1 TLV (tag-length-value) blocks out of DER-encoded data. It is the primitive underneath all X.509 certificate parsing in NetX Secure, and therefore runs on certificates supplied by a remote peer during the TLS handshake.</p><p>The function reads the one-byte ASN.1 tag from the caller's buffer *before* checking that the buffer holds at least one byte. When a caller passes a remaining length of zero, the guard correctly returns `NX_SECURE_X509_ASN1_LENGTH_TOO_LONG`, but the read has already happened one byte past the end of the buffer.</p><p>code:</p><p>nx_secure/src/nx_secure_x509_asn1_tlv_block_parse.c</p><p>```</p><p>UINT _nx_secure_x509_asn1_tlv_block_parse(const UCHAR *buffer, ULONG *buffer_length, USHORT *tlv_type,</p><code>                                          USHORT *tlv_tag_class, ULONG *tlv_length,</code><br><code>                                          const UCHAR **tlv_data, ULONG *header_length)</code><br><p>{</p><p>UINT   current_index;</p><p>USHORT current_tag;</p><p>ULONG  length;</p><p>ULONG  length_bytes;</p><code>    current_index = 0;</code><br><code>    current_tag = buffer[current_index];      /* &lt;-- read before the bounds check */</code><br><code>    if (*buffer_length &lt; 1)</code><br><code>    {</code><br><code>        return(NX_SECURE_X509_ASN1_LENGTH_TOO_LONG);</code><br><code>    }</code><br><p>```</p><p>The remainder of the function is correctly ordered. The multi-byte length path is guarded by `length_bytes &gt; 4 || length_bytes &gt; *buffer_length` before its read loop, the decoded value is checked against `length &gt; *buffer_length`, and the second single-byte length read follows its own `*buffer_length &lt; 1` guard. The tag read is the only load placed ahead of its check.</p>"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-f95g-xc4w-mrcr"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "tinic",
                    "type": "finder"
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "x_generator": {
                "engine": "Vulnogram 1.0.5"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "cvssV3_1": {
                            "scope": "UNCHANGED",
                            "version": "3.1",
                            "baseScore": 7.5,
                            "attackVector": "NETWORK",
                            "baseSeverity": "HIGH",
                            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                            "integrityImpact": "NONE",
                            "userInteraction": "NONE",
                            "attackComplexity": "LOW",
                            "availabilityImpact": "HIGH",
                            "privilegesRequired": "NONE",
                            "confidentialityImpact": "NONE"
                        }
                    },
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-30T20:42:14.455455Z",
                                "id": "CVE-2026-102758",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-30T20:42:39.497Z"
                }
            }
        ]
    }
}