{"id":"CVE-2023-27830","aliases":["EUVD-2023-31566","GHSA-w347-2542-wgjq"],"status":"published","title":"TightVNC before v2.8.75 allows attackers to escalate privileges on the host operating system via...","description":"TightVNC before v2.8.75 allows attackers to escalate privileges on the host operating system via replacing legitimate files with crafted files when executing a file transfer. This is due to the fact that TightVNC runs in the backend as a high-privileges account.","severity":{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01078,"percentile":0.65464,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-269"],"published":"2023-04-12T00:00:00Z","modified":"2026-06-17T05:45:55Z","products":[{"vendor":"tightvnc","product":"tightvnc"}],"references":[{"url":"https://www.tightvnc.com/whatsnew.php","tags":["x_transferred","Product","Release Notes"]},{"url":"https://medium.com/nestedif/vulnerability-disclosure-privilege-escalation-tightvnc-8165208cce","tags":["x_transferred","Exploit","Third Party Advisory"]},{"url":"https://www.tightvnc.com/news.php","tags":["x_transferred","Product","Release Notes"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-27830"},{"url":"https://github.com/advisories/GHSA-w347-2542-wgjq"}],"sources":{"cve":[{"id":"CVE-2023-27830","description":"TightVNC before v2.8.75 allows attackers to escalate privileges on the host operating system via replacing legitimate files with crafted files when executing a file transfer. This is due to the fact that TightVNC runs in the backend as a high-privileges account.","status":"published","published":"2023-04-12T00:00:00Z","modified":"2025-02-08T02:40:24.901Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:35:26.261013Z"}],"euvd":[{"id":"EUVD-2023-31566","description":"TightVNC before v2.8.75 allows attackers to escalate privileges on the host operating system via replacing legitimate files with crafted files when executing a file transfer. This is due to the fact that TightVNC runs in the backend as a high-privileges account.","status":"published","published":"2023-04-12T00:00:00Z","modified":"2025-02-08T02:40:24Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T00:04:01.319038Z"}],"ghsa":[{"id":"GHSA-w347-2542-wgjq","title":"TightVNC before v2.8.75 allows attackers to escalate privileges on the host operating system via...","description":"TightVNC before v2.8.75 allows attackers to escalate privileges on the host operating system via replacing legitimate files with crafted files when executing a file transfer. This is due to the fact that TightVNC runs in the backend as a high-privileges account.","status":"published","published":"2023-04-12T15:30:44Z","modified":"2024-04-04T03:25:11Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:56:14.876837Z"}],"nvd":[{"id":"CVE-2023-27830","description":"TightVNC before v2.8.75 allows attackers to escalate privileges on the host operating system via replacing legitimate files with crafted files when executing a file transfer. This is due to the fact that TightVNC runs in the backend as a high-privileges account.","status":"published","published":"2023-04-12T15:15:12.83Z","modified":"2026-06-17T05:45:55.677Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:07:55.652109Z"}]}}