{"id":"CVE-2011-1775","aliases":["EUVD-2011-1773","GHSA-g8f8-5m52-5p35","RHSA-2011:0871"],"status":"published","title":"The CSecurityTLS::processMsg function in common/rfb/CSecurityTLS.cxx in the vncviewer component...","description":"The CSecurityTLS::processMsg function in common/rfb/CSecurityTLS.cxx in the vncviewer component in TigerVNC 1.1beta1 does not properly verify the server's X.509 certificate, which allows man-in-the-middle attackers to spoof a TLS VNC server via an arbitrary certificate.","severity":{"version":"2.0","score":5.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.0129,"percentile":0.70427,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2011-05-26T18:00:00Z","modified":"2026-06-26T10:16:20Z","fixes":[{"ecosystem":"Red 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CSecurityTLS::processMsg function in common/rfb/CSecurityTLS.cxx in the vncviewer component in TigerVNC 1.1beta1 does not properly verify the server's X.509 certificate, which allows man-in-the-middle attackers to spoof a TLS VNC server via an arbitrary certificate.","status":"published","published":"2011-05-26T18:00:00Z","modified":"2024-08-06T22:37:25.77Z","updated_at":"2026-11-02T14:35:38.711857Z"}],"euvd":[{"id":"EUVD-2011-1773","description":"The CSecurityTLS::processMsg function in common/rfb/CSecurityTLS.cxx in the vncviewer component in TigerVNC 1.1beta1 does not properly verify the server's X.509 certificate, which allows man-in-the-middle attackers to spoof a TLS VNC server via an arbitrary certificate.","status":"published","published":"2011-05-26T18:00:00Z","modified":"2024-08-06T22:37:25Z","updated_at":"2026-11-03T01:55:55.207376Z"}],"ghsa":[{"id":"GHSA-g8f8-5m52-5p35","title":"The CSecurityTLS::processMsg function in common/rfb/CSecurityTLS.cxx in the vncviewer component...","description":"The CSecurityTLS::processMsg function in common/rfb/CSecurityTLS.cxx in the vncviewer component in TigerVNC 1.1beta1 does not properly verify the server's X.509 certificate, which allows man-in-the-middle attackers to spoof a TLS VNC server via an arbitrary certificate.","status":"published","published":"2022-05-17T05:39:44Z","modified":"2023-02-13T00:30:48Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:54:04.926808Z"}],"nvd":[{"id":"CVE-2011-1775","description":"The CSecurityTLS::processMsg function in common/rfb/CSecurityTLS.cxx in the vncviewer component in TigerVNC 1.1beta1 does not properly verify the server's X.509 certificate, which allows man-in-the-middle attackers to spoof a TLS VNC server via an arbitrary certificate.","status":"published","published":"2011-05-26T18:55:02.287Z","modified":"2026-06-16T23:30:00.28Z","cvss":[{"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-20"],"updated_at":"2026-11-02T14:02:08.47516Z"}],"osv":[{"id":"RHSA-2011:0871","title":"Red Hat Security Advisory: tigervnc security update","status":"published","published":"2024-09-15T19:09:49Z","modified":"2026-06-26T10:16:20Z","updated_at":"2026-11-02T15:53:01.003286Z"}]}}