{"id":"CVE-2025-27377","aliases":["EUVD-2026-4175","GHSA-xfvg-p8x9-f25q"],"status":"published","title":"Missing Validation of Self-Signed Certificates in Altium Designer Allows Man-in-the-Middle Attacks","description":"Altium Designer version 24.9.0 does not validate self-signed server certificates for cloud connections. An attacker capable of performing a man-in-the-middle (MITM) attack could exploit this issue to intercept or manipulate network traffic, potentially exposing authentication credentials or sensitive design data.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0019,"percentile":0.0873,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-295"],"published":"2026-01-22T00:16:04Z","modified":"2026-06-17T09:03:29Z","products":[{"vendor":"altium","product":"altium designer"},{"vendor":"altium","product":"designer"}],"references":[{"url":"https://www.altium.com/platform/security-compliance/security-advisories","tags":["Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-27377"},{"url":"https://github.com/advisories/GHSA-xfvg-p8x9-f25q"}],"sources":{"cve":[{"id":"CVE-2025-27377","title":"Missing Validation of Self-Signed Certificates in Altium Designer Allows Man-in-the-Middle Attacks","description":"Altium Designer version 24.9.0 does not validate self-signed server certificates for cloud connections. An attacker capable of performing a man-in-the-middle (MITM) attack could exploit this issue to intercept or manipulate network traffic, potentially exposing authentication credentials or sensitive design data.","status":"published","published":"2026-01-22T00:16:04.634Z","modified":"2026-01-22T14:41:16.446Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:32:42.078906Z"}],"euvd":[{"id":"EUVD-2026-4175","description":"Altium Designer version 24.9.0 does not validate self-signed server certificates for cloud connections. An attacker capable of performing a man-in-the-middle (MITM) attack could exploit this issue to intercept or manipulate network traffic, potentially exposing authentication credentials or sensitive design data.","status":"published","published":"2026-01-22T00:16:04Z","modified":"2026-01-22T14:41:16Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T19:48:48.974823Z"}],"ghsa":[{"id":"GHSA-xfvg-p8x9-f25q","title":"Altium Designer version 24.9.0 does not validate self-signed server certificates for cloud...","description":"Altium Designer version 24.9.0 does not validate self-signed server certificates for cloud connections. An attacker capable of performing a man-in-the-middle (MITM) attack could exploit this issue to intercept or manipulate network traffic, potentially exposing authentication credentials or sensitive design data.","status":"published","published":"2026-01-22T03:31:27Z","modified":"2026-01-22T03:31:28Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T15:05:50.792909Z"}],"nvd":[{"id":"CVE-2025-27377","description":"Altium Designer version 24.9.0 does not validate self-signed server certificates for cloud connections. An attacker capable of performing a man-in-the-middle (MITM) attack could exploit this issue to intercept or manipulate network traffic, potentially exposing authentication credentials or sensitive design data.","status":"published","published":"2026-01-22T01:15:50.51Z","modified":"2026-06-17T09:03:29.123Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:11:57.915063Z"}]}}