{"id":"CVE-2020-27297","aliases":["EUVD-2020-19810","GHSA-qprq-p274-84fq"],"status":"published","title":"The affected product is vulnerable to a heap-based buffer overflow, which may allow an attacker...","description":"The affected product is vulnerable to a heap-based buffer overflow, which may allow an attacker to manipulate memory with controlled values and remotely execute code on the OPC UA Tunneller (versions prior to 6.3.0.8233).","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.02515,"percentile":0.8502,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122","CWE-787"],"published":"2021-01-26T19:06:19Z","modified":"2026-06-17T03:09:07Z","products":[{"vendor":"honeywell","product":"opc_ua_tunneller"},{"vendor":"matrikon, honeywell","product":"opc ua tunneller"}],"references":[{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-021-03","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27297"},{"url":"https://github.com/advisories/GHSA-qprq-p274-84fq"}],"sources":{"cve":[{"id":"CVE-2020-27297","description":"The affected product is vulnerable to a heap-based buffer overflow, which may allow an attacker to manipulate memory with controlled values and remotely execute code on the OPC UA Tunneller (versions prior to 6.3.0.8233).","status":"published","published":"2021-01-26T19:06:19Z","modified":"2024-08-04T16:11:36.582Z","cwes":["CWE-122"],"updated_at":"2026-11-02T14:35:53.552996Z"}],"euvd":[{"id":"EUVD-2020-19810","description":"The affected product is vulnerable to a heap-based buffer overflow, which may allow an attacker to manipulate memory with controlled values and remotely execute code on the OPC UA Tunneller (versions prior to 6.3.0.8233).","status":"published","published":"2021-01-26T19:06:19Z","modified":"2024-08-04T16:11:36Z","updated_at":"2026-11-03T03:07:12.940476Z"}],"ghsa":[{"id":"GHSA-qprq-p274-84fq","title":"The affected product is vulnerable to a heap-based buffer overflow, which may allow an attacker...","description":"The affected product is vulnerable to a heap-based buffer overflow, which may allow an attacker to manipulate memory with controlled values and remotely execute code on the OPC UA Tunneller (versions prior to 6.3.0.8233).","status":"published","published":"2022-05-24T17:40:12Z","modified":"2023-01-29T05:06:15Z","cwes":["CWE-787"],"updated_at":"2026-11-02T14:45:59.056416Z"}],"nvd":[{"id":"CVE-2020-27297","description":"The affected product is vulnerable to a heap-based buffer overflow, which may allow an attacker to manipulate memory with controlled values and remotely execute code on the OPC UA Tunneller (versions prior to 6.3.0.8233).","status":"published","published":"2021-01-26T19:15:12.923Z","modified":"2026-06-17T03:09:07.94Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-122","CWE-787"],"updated_at":"2026-11-02T14:06:30.596418Z"}]}}