{"affected":[{"product":"asn1scc","source":"CNA: GitHub_M","vendor":"esa","versions":[{"status":"affected","version":"< 4.7.0.1"}]}],"cveId":"CVE-2026-75615","cwes":["CWE-125","CWE-129"],"description":"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.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":5.3,"severity":"medium","source":"CNA: GitHub_M","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}],"modifiedAt":1793897360422,"publishedAt":1793897360422,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/esa/asn1scc/security/advisories/GHSA-234q-m7gr-pcf8"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/esa/asn1scc/commit/fe6ab763bc60d8a2def4104c15414809b45fffd9"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/esa/asn1scc/releases/tag/4.7.0.1"}],"remediation":[],"revision":"62d40ae2129d85ae71de0a8e15a873b350474bc50694ce548de187a321851280","sources":[{"modifiedAt":1793897360422,"name":"CNA: GitHub_M","retrievedAt":1793898831074,"url":"https://www.cve.org/CVERecord?id=CVE-2026-75615"}],"ssvc":null,"status":"published","title":"ASN1SCC: Out-of-bounds read via unvalidated character index in ASN.1 string decoders","updatedAt":1793898831074}