{"id":"CVE-2025-7071","aliases":["EUVD-2025-28779","GHSA-fw6m-5fq2-8fqr"],"status":"published","title":"Timing side-channel vulnerability in AES-CBC decryption with PKCS#7 padding in ocrypto library","description":"Padding oracle attack vulnerability in Oberon microsystem AG’s ocrypto library in all versions since 3.1.0 and prior to 3.9.2 allows an attacker to recover plaintexts via timing measurements of AES-CBC PKCS#7 decrypt operations.","severity":{"version":"4.0","score":5.9,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0009,"percentile":0.00413,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-208","CWE-327"],"published":"2025-08-29T09:18:06Z","modified":"2026-10-18T21:10:00Z","products":[{"vendor":"oberon microsystems ag","product":"ocrypto"}],"references":[{"url":"https://www.oberon.ch/security-advisories/cve-2025-7071/"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-7071"},{"url":"https://www.oberon.ch/security-advisories/cve-2025-7071"},{"url":"https://github.com/advisories/GHSA-fw6m-5fq2-8fqr"}],"sources":{"cve":[{"id":"CVE-2025-7071","title":"Timing side-channel vulnerability in AES-CBC decryption with PKCS#7 padding in ocrypto library","description":"Padding oracle attack vulnerability in Oberon microsystem AG’s ocrypto library in all versions since 3.1.0 and prior to 3.9.2 allows an attacker to recover plaintexts via timing measurements of AES-CBC PKCS#7 decrypt operations.","status":"published","published":"2025-08-29T09:18:06.911Z","modified":"2025-08-29T12:07:57.827Z","cvss":[{"version":"4.0","score":5.9,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-208","CWE-327"],"updated_at":"2026-11-02T14:32:51.880027Z"}],"euvd":[{"id":"EUVD-2025-28779","description":"Padding oracle attack vulnerability in Oberon microsystem AG’s ocrypto library in all versions since 3.1.0 and prior to 3.9.2 allows an attacker to recover plaintexts via timing measurements of AES-CBC PKCS#7 decrypt operations.","status":"published","published":"2025-08-29T09:18:06Z","modified":"2025-08-29T12:07:57Z","cvss":[{"version":"4.0","score":5.9,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T20:31:50.093994Z"}],"ghsa":[{"id":"GHSA-fw6m-5fq2-8fqr","title":"Padding oracle attack vulnerability in Oberon microsystem AG’s ocrypto library in all versions...","description":"Padding oracle attack vulnerability in Oberon microsystem AG’s ocrypto library in all versions since 3.1.0 and prior to 3.9.2 allows an attacker to recover plaintexts via timing measurements of AES-CBC PKCS#7 decrypt operations.","status":"published","published":"2025-08-29T12:31:11Z","modified":"2025-08-29T12:31:18Z","cvss":[{"version":"4.0","score":5.9,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-208"],"updated_at":"2026-11-02T15:03:27.292795Z"}],"nvd":[{"id":"CVE-2025-7071","description":"Padding oracle attack vulnerability in Oberon microsystem AG’s ocrypto library in all versions since 3.1.0 and prior to 3.9.2 allows an attacker to recover plaintexts via timing measurements of AES-CBC PKCS#7 decrypt operations.","status":"published","published":"2025-08-29T10:15:32.63Z","modified":"2026-10-18T21:10:00.12Z","cvss":[{"version":"4.0","score":5.9,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-208","CWE-327"],"updated_at":"2026-11-02T14:11:26.200344Z"}]}}