{"id":"CVE-2021-27432","aliases":["EUVD-2021-14186","GHSA-5rm8-9376-7gg5"],"status":"published","title":"OPC Foundation UA .NET Standard versions prior to 1.4.365.48 and OPC UA .NET Legacy are...","description":"OPC Foundation UA .NET Standard versions prior to 1.4.365.48 and OPC UA .NET Legacy are vulnerable to an uncontrolled recursion, which may allow an attacker to trigger a stack overflow.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.0195,"percentile":0.80393,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-674"],"published":"2021-05-20T15:20:01Z","modified":"2026-10-24T10:30:22Z","products":[{"vendor":"opcfoundation","product":"ua-.net-legacy"},{"vendor":"opcfoundation","product":"ua_.net_standard_stack"}],"references":[{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-133-03","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","US Government Resource","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27432"},{"url":"https://github.com/advisories/GHSA-5rm8-9376-7gg5"}],"sources":{"cve":[{"id":"CVE-2021-27432","description":"OPC Foundation UA .NET Standard versions prior to 1.4.365.48 and OPC UA .NET Legacy are vulnerable to an uncontrolled recursion, which may allow an attacker to trigger a stack overflow.","status":"published","published":"2021-05-20T15:20:01Z","modified":"2024-08-03T20:48:17.22Z","cwes":["CWE-674"],"updated_at":"2026-11-02T14:33:04.360272Z"}],"euvd":[{"id":"EUVD-2021-14186","description":"OPC Foundation UA .NET Standard versions prior to 1.4.365.48 and OPC UA .NET Legacy are vulnerable to an uncontrolled recursion, which may allow an attacker to trigger a stack overflow.","status":"published","published":"2021-05-20T15:20:01Z","modified":"2024-08-03T20:48:17Z","updated_at":"2026-11-03T03:24:49.368497Z"}],"ghsa":[{"id":"GHSA-5rm8-9376-7gg5","title":"OPC Foundation UA .NET Standard versions prior to 1.4.365.48 and OPC UA .NET Legacy are...","description":"OPC Foundation UA .NET Standard versions prior to 1.4.365.48 and OPC UA .NET Legacy are vulnerable to an uncontrolled recursion, which may allow an attacker to trigger a stack overflow.","status":"published","published":"2022-05-24T19:02:50Z","modified":"2023-01-29T05:07:41Z","cwes":["CWE-674"],"updated_at":"2026-11-02T14:46:11.123221Z"}],"nvd":[{"id":"CVE-2021-27432","description":"OPC Foundation UA .NET Standard versions prior to 1.4.365.48 and OPC UA .NET Legacy are vulnerable to an uncontrolled recursion, which may allow an attacker to trigger a stack overflow.","status":"published","published":"2021-05-20T16:15:07.967Z","modified":"2026-06-17T03:44:51.08Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-674"],"updated_at":"2026-11-02T14:06:53.987491Z"}],"osv":[{"id":"CVE-2021-27432","description":"OPC Foundation UA .NET Standard versions prior to 1.4.365.48 and OPC UA .NET Legacy are vulnerable to an uncontrolled recursion, which may allow an attacker to trigger a stack overflow.","status":"published","published":"2021-05-20T16:15:07.967Z","modified":"2026-10-24T10:30:22.523298813Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:19.129331Z"}]}}