{"id":"CVE-2020-27274","aliases":["EUVD-2020-19787","GHSA-p5jr-488h-j8p7"],"status":"published","title":"Some parsing functions in the affected product do not check the return value of malloc and the...","description":"Some parsing functions in the affected product do not check the return value of malloc and the thread handling the message is forced to close, which may lead to a denial-of-service condition on the OPC UA Tunneller (versions prior to 6.3.0.8233).","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":0.01164,"percentile":0.67533,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-754"],"published":"2021-01-26T19:03:18Z","modified":"2026-06-17T03:09:05Z","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-2020-27274"},{"url":"https://github.com/advisories/GHSA-p5jr-488h-j8p7"}],"sources":{"cve":[{"id":"CVE-2020-27274","description":"Some parsing functions in the affected product do not check the return value of malloc and the thread handling the message is forced to close, which may lead to a denial-of-service condition on the OPC UA Tunneller (versions prior to 6.3.0.8233).","status":"published","published":"2021-01-26T19:03:18Z","modified":"2024-08-04T16:11:36.611Z","cwes":["CWE-754"],"updated_at":"2026-11-02T14:35:53.552996Z"}],"euvd":[{"id":"EUVD-2020-19787","description":"Some parsing functions in the affected product do not check the return value of malloc and the thread handling the message is forced to close, which may lead to a denial-of-service condition on the OPC UA Tunneller (versions prior to 6.3.0.8233).","status":"published","published":"2021-01-26T19:03:18Z","modified":"2024-08-04T16:11:36Z","updated_at":"2026-11-03T03:07:12.940476Z"}],"ghsa":[{"id":"GHSA-p5jr-488h-j8p7","title":"Some parsing functions in the affected product do not check the return value of malloc and the...","description":"Some parsing functions in the affected product do not check the return value of malloc and the thread handling the message is forced to close, which may lead to a denial-of-service condition on the OPC UA Tunneller (versions prior to 6.3.0.8233).","status":"published","published":"2022-05-24T17:40:10Z","modified":"2023-01-29T05:06:15Z","cwes":["CWE-754"],"updated_at":"2026-11-02T14:45:59.056416Z"}],"nvd":[{"id":"CVE-2020-27274","description":"Some parsing functions in the affected product do not check the return value of malloc and the thread handling the message is forced to close, which may lead to a denial-of-service condition on the OPC UA Tunneller (versions prior to 6.3.0.8233).","status":"published","published":"2021-01-26T19:15:12.86Z","modified":"2026-06-17T03:09:05.673Z","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-754"],"updated_at":"2026-11-02T14:06:30.596418Z"}]}}