{"id":"CVE-2021-27899","aliases":["EUVD-2021-14636","GHSA-w2jc-6hpr-7cwc"],"status":"published","title":"The Proofpoint Insider Threat Management Agents (formerly ObserveIT Agent) for MacOS and Linux...","description":"The Proofpoint Insider Threat Management Agents (formerly ObserveIT Agent) for MacOS and Linux perform improper validation of the ITM Server's certificate, which enables a remote attacker to intercept and alter these communications using a man-in-the-middle attack. All versions before 7.11.1 are affected. Agents for Windows and Cloud are not affected.","severity":{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00634,"percentile":0.50851,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-295"],"published":"2021-04-06T20:48:11Z","modified":"2026-06-17T03:45:34Z","products":[{"vendor":"proofpoint","product":"insider_threat_management"}],"references":[{"url":"https://www.proofpoint.com/us/security/security-advisories/pfpt-sa-2021-0004","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27899"},{"url":"https://github.com/advisories/GHSA-w2jc-6hpr-7cwc"}],"sources":{"cve":[{"id":"CVE-2021-27899","description":"The Proofpoint Insider Threat Management Agents (formerly ObserveIT Agent) for MacOS and Linux perform improper validation of the ITM Server's certificate, which enables a remote attacker to intercept and alter these communications using a man-in-the-middle attack. All versions before 7.11.1 are affected. Agents for Windows and Cloud are not affected.","status":"published","published":"2021-04-06T20:48:11Z","modified":"2024-08-03T21:33:17.422Z","updated_at":"2026-11-02T14:33:04.679189Z"}],"euvd":[{"id":"EUVD-2021-14636","description":"The Proofpoint Insider Threat Management Agents (formerly ObserveIT Agent) for MacOS and Linux perform improper validation of the ITM Server's certificate, which enables a remote attacker to intercept and alter these communications using a man-in-the-middle attack. All versions before 7.11.1 are affected. Agents for Windows and Cloud are not affected.","status":"published","published":"2021-04-06T20:48:11Z","modified":"2024-08-03T21:33:17Z","updated_at":"2026-11-03T03:24:47.80549Z"}],"ghsa":[{"id":"GHSA-w2jc-6hpr-7cwc","title":"The Proofpoint Insider Threat Management Agents (formerly ObserveIT Agent) for MacOS and Linux...","description":"The Proofpoint Insider Threat Management Agents (formerly ObserveIT Agent) for MacOS and Linux perform improper validation of the ITM Server's certificate, which enables a remote attacker to intercept and alter these communications using a man-in-the-middle attack. All versions before 7.11.1 are affected. Agents for Windows and Cloud are not affected.","status":"published","published":"2022-05-24T17:46:37Z","modified":"2023-01-29T05:06:16Z","cwes":["CWE-295"],"updated_at":"2026-11-02T14:45:59.056416Z"}],"nvd":[{"id":"CVE-2021-27899","description":"The Proofpoint Insider Threat Management Agents (formerly ObserveIT Agent) for MacOS and Linux perform improper validation of the ITM Server's certificate, which enables a remote attacker to intercept and alter these communications using a man-in-the-middle attack. All versions before 7.11.1 are affected. Agents for Windows and Cloud are not affected.","status":"published","published":"2021-04-06T21:15:14.457Z","modified":"2026-06-17T03:45:34.477Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:06:51.610648Z"}]}}