{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "fixed": "4.7.0.1"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "fixed": "fe6ab763bc60d8a2def4104c15414809b45fffd9"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "original_tag": "4.7.0.1",
                "range": [
                  {
                    "fixed": "8437befc92eb04f20a47c38f4ac4742c0ff1617c"
                  }
                ],
                "source": "REFERENCES_TAG"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8437befc92eb04f20a47c38f4ac4742c0ff1617c"
            },
            {
              "fixed": "fe6ab763bc60d8a2def4104c15414809b45fffd9"
            }
          ],
          "repo": "https://github.com/esa/asn1scc",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-234q-m7gr-pcf8"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-125",
      "CWE-129"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75615.json"
  },
  "details": "ASN1SCC is an open source ASN.1 compiler for embedded systems. Prior to 4.7.0.1, the ACN runtime function Acn_Dec_String_CharIndex_private in asn1crt/asn1crt_encoding_acn.c and the generated uPER decoder InternalItem_string_with_alpha_decode in StgC/uper_c.stg do not validate a decoded character index before reading allowedCharSet. For string alphabets whose size is not a power of two, a crafted message can select an unused encoded index, read a small bounded window of adjacent static program constants, and return the byte as a successfully decoded character. The full 128-character IA5String alphabet is not affected. This issue is fixed in version 4.7.0.1.",
  "id": "CVE-2026-75615",
  "modified": "2026-11-05T21:15:35.753025448Z",
  "published": "2026-11-05T16:49:20.422Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75615.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/esa/asn1scc/commit/fe6ab763bc60d8a2def4104c15414809b45fffd9"
    },
    {
      "type": "WEB",
      "url": "https://github.com/esa/asn1scc/releases/tag/4.7.0.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/esa/asn1scc/security/advisories/GHSA-234q-m7gr-pcf8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-75615"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ASN1SCC: Out-of-bounds read via unvalidated character index in ASN.1 string decoders"
}