{"cve":"CVE-2023-27830","nvd":{"published":"2023-04-12T15:15:12.830","modified":"2026-06-17T05:45:55.677","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","score":9.0},"cwes":["CWE-269"],"references":["https://medium.com/nestedif/vulnerability-disclosure-privilege-escalation-tightvnc-8165208cce","https://www.tightvnc.com/news.php","https://www.tightvnc.com/whatsnew.php","https://medium.com/nestedif/vulnerability-disclosure-privilege-escalation-tightvnc-8165208cce","https://www.tightvnc.com/news.php"],"products":["tightvnc:tightvnc"],"source":"nvd","synced_at":"2026-10-19T21:38:05.473481323+00:00"},"epss":{"cve":"CVE-2023-27830","score":0.01078,"percentile":0.65041,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}