{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "asn1scc",
          "vendor": "esa",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 4.7.0.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "CWE-125: Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-129",
              "description": "CWE-129: Improper Validation of Array Index",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-05T16:49:20.422Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/esa/asn1scc/security/advisories/GHSA-234q-m7gr-pcf8",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/esa/asn1scc/security/advisories/GHSA-234q-m7gr-pcf8"
        },
        {
          "name": "https://github.com/esa/asn1scc/commit/fe6ab763bc60d8a2def4104c15414809b45fffd9",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/esa/asn1scc/commit/fe6ab763bc60d8a2def4104c15414809b45fffd9"
        },
        {
          "name": "https://github.com/esa/asn1scc/releases/tag/4.7.0.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/esa/asn1scc/releases/tag/4.7.0.1"
        }
      ],
      "source": {
        "advisory": "GHSA-234q-m7gr-pcf8",
        "discovery": "UNKNOWN"
      },
      "title": "ASN1SCC: Out-of-bounds read via unvalidated character index in ASN.1 string decoders"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-75615",
    "datePublished": "2026-11-05T16:49:20.422Z",
    "dateReserved": "2026-08-17T23:49:03.451Z",
    "dateUpdated": "2026-11-05T16:49:20.422Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}