{"id":"CVE-2025-27458","aliases":["EUVD-2025-19870","GHSA-hcwq-wcmg-w44r"],"status":"published","title":"CVE-2025-27458","description":"The VNC authentication mechanism bases on a challenge-response system where both server and client use the same password for encryption. The challenge is sent from the server to the client, is encrypted by the client and sent back. The server does the same encryption locally and if the responses match it is prooven that the client knows the correct password. Since all VNC communication is unencrypted, an attacker can obtain the challenge and response and try to derive the password from this information.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00205,"percentile":0.10538,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-327"],"published":"2025-07-03T11:33:30Z","modified":"2026-06-17T09:03:37Z","products":[{"vendor":"endress","product":"meac300-fnade4_firmware"},{"vendor":"endress+hauser","product":"endress+hauser meac300-fnade4"}],"references":[{"url":"https://www.endress.com","tags":["x_Endress+Hauser","Product"]},{"url":"https://sick.com/psirt","tags":["x_SICK PSIRT Security Advisories","vendor-advisory","Vendor Advisory"]},{"url":"https://www.cisa.gov/resources-tools/resources/ics-recommended-practices","tags":["x_ICS-CERT recommended practices on Industrial Security","US Government Resource"]},{"url":"https://www.first.org/cvss/calculator/3.1","tags":["x_CVSS v3.1 Calculator","Not Applicable"]},{"url":"https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.json","tags":["x_The canonical URL.","Vendor Advisory"]},{"url":"https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.pdf","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-27458"},{"url":"https://github.com/advisories/GHSA-hcwq-wcmg-w44r"}],"sources":{"cve":[{"id":"CVE-2025-27458","title":"CVE-2025-27458","description":"The VNC authentication mechanism bases on a challenge-response system where both server and client use the same password for encryption. The challenge is sent from the server to the client, is encrypted by the client and sent back. The server does the same encryption locally and if the responses match it is prooven that the client knows the correct password. Since all VNC communication is unencrypted, an attacker can obtain the challenge and response and try to derive the password from this information.","status":"published","published":"2025-07-03T11:33:30.605Z","modified":"2025-07-03T13:15:43.013Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-327"],"updated_at":"2026-11-02T14:32:42.751171Z"}],"euvd":[{"id":"EUVD-2025-19870","description":"The VNC authentication mechanism bases on a challenge-response system where both server and client use the same password for encryption. The challenge is sent from the server to the client, is encrypted by the client and sent back. The server does the same encryption locally and if the responses match it is prooven that the client knows the correct password. Since all VNC communication is unencrypted, an attacker can obtain the challenge and response and try to derive the password from this information.","status":"published","published":"2025-07-03T11:33:30Z","modified":"2025-07-03T13:15:43Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T20:32:14.284181Z"}],"ghsa":[{"id":"GHSA-hcwq-wcmg-w44r","title":"The VNC authentication mechanism bases on a challenge-response system where both server and...","description":"The VNC authentication mechanism bases on a challenge-response system where both server and client use the same password for encryption. The challenge is sent from the server to the client, is encrypted by the client and sent back. The server does the same encryption locally and if the responses match it is prooven that the client knows the correct password. Since all VNC communication is unencrypted, an attacker can obtain the challenge and response and try to derive the password from this information.","status":"published","published":"2025-07-03T12:34:58Z","modified":"2025-07-03T12:35:09Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-327"],"updated_at":"2026-11-02T15:02:53.892162Z"}],"nvd":[{"id":"CVE-2025-27458","description":"The VNC authentication mechanism bases on a challenge-response system where both server and client use the same password for encryption. The challenge is sent from the server to the client, is encrypted by the client and sent back. The server does the same encryption locally and if the responses match it is prooven that the client knows the correct password. Since all VNC communication is unencrypted, an attacker can obtain the challenge and response and try to derive the password from this information.","status":"published","published":"2025-07-03T12:15:23.917Z","modified":"2026-06-17T09:03:37.743Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-327"],"updated_at":"2026-11-02T14:11:15.754475Z"}]}}