PatchTheCVE: libvnc projecthttps://patchthecve.com/CVEs with upgrade or downgrade fix stepsCVE-2020-14405: An issue was discovered in LibVNCServer before 0.9.13https://patchthecve.com/cve/CVE-2020-14405.htmlhttps://patchthecve.com/cve/CVE-2020-14405.htmlWed, 17 Jun 2026 02:54:42 +0000MEDIUM 6.5: An issue was discovered in LibVNCServer before 0.9.13. libvncclient/rfbproto.c does not limit TextChat size.CVE-2020-14404: An issue was discovered in LibVNCServer before 0.9.13https://patchthecve.com/cve/CVE-2020-14404.htmlhttps://patchthecve.com/cve/CVE-2020-14404.htmlWed, 17 Jun 2026 02:54:42 +0000MEDIUM 5.4: An issue was discovered in LibVNCServer before 0.9.13. libvncserver/rre.c allows out-of-bounds access via encodings.CVE-2020-14403: An issue was discovered in LibVNCServer before 0.9.13https://patchthecve.com/cve/CVE-2020-14403.htmlhttps://patchthecve.com/cve/CVE-2020-14403.htmlWed, 17 Jun 2026 02:54:42 +0000MEDIUM 5.4: An issue was discovered in LibVNCServer before 0.9.13. libvncserver/hextile.c allows out-of-bounds access via encodings.CVE-2020-14402: An issue was discovered in LibVNCServer before 0.9.13https://patchthecve.com/cve/CVE-2020-14402.htmlhttps://patchthecve.com/cve/CVE-2020-14402.htmlWed, 17 Jun 2026 02:54:42 +0000MEDIUM 5.4: An issue was discovered in LibVNCServer before 0.9.13. libvncserver/corre.c allows out-of-bounds access via encodings.CVE-2020-14398: An issue was discovered in LibVNCServer before 0.9.13https://patchthecve.com/cve/CVE-2020-14398.htmlhttps://patchthecve.com/cve/CVE-2020-14398.htmlWed, 17 Jun 2026 02:54:41 +0000HIGH 7.5: An issue was discovered in LibVNCServer before 0.9.13. An improperly closed TCP connection causes an infinite loop in libvncclient/sockets.c.CVE-2020-14397: An issue was discovered in LibVNCServer before 0.9.13https://patchthecve.com/cve/CVE-2020-14397.htmlhttps://patchthecve.com/cve/CVE-2020-14397.htmlWed, 17 Jun 2026 02:54:41 +0000HIGH 7.5: An issue was discovered in LibVNCServer before 0.9.13. libvncserver/rfbregion.c has a NULL pointer dereference.CVE-2020-14396: An issue was discovered in LibVNCServer before 0.9.13https://patchthecve.com/cve/CVE-2020-14396.htmlhttps://patchthecve.com/cve/CVE-2020-14396.htmlWed, 17 Jun 2026 02:54:41 +0000HIGH 7.5: An issue was discovered in LibVNCServer before 0.9.13. libvncclient/tls_openssl.c has a NULL pointer dereference.CVE-2019-20840: An issue was discovered in LibVNCServer before 0.9.13https://patchthecve.com/cve/CVE-2019-20840.htmlhttps://patchthecve.com/cve/CVE-2019-20840.htmlWed, 17 Jun 2026 02:31:17 +0000HIGH 7.5: An issue was discovered in LibVNCServer before 0.9.13. libvncserver/ws_decode.c can lead to a crash because of unaligned accesses in hybiReadAndDecode.CVE-2019-20839: libvncclient/sockets.c in LibVNCServer before 0.9.13 has a buffer overflow via a long socket filename.https://patchthecve.com/cve/CVE-2019-20839.htmlhttps://patchthecve.com/cve/CVE-2019-20839.htmlWed, 17 Jun 2026 02:31:17 +0000HIGH 7.5: libvncclient/sockets.c in LibVNCServer before 0.9.13 has a buffer overflow via a long socket filename.CVE-2018-21247: An issue was discovered in LibVNCServer before 0.9.13https://patchthecve.com/cve/CVE-2018-21247.htmlhttps://patchthecve.com/cve/CVE-2018-21247.htmlWed, 17 Jun 2026 01:54:27 +0000HIGH 7.5: An issue was discovered in LibVNCServer before 0.9.13. There is an information leak (of uninitialized memory contents) in the libvncclient/rfbproto.c ConnectToRFBRepeater function.CVE-2019-20788: libvncclient/cursor.c in LibVNCServer through 0.9.12 has a HandleCursorShape integer overflow and heap-based bhttps://patchthecve.com/cve/CVE-2019-20788.htmlhttps://patchthecve.com/cve/CVE-2019-20788.htmlWed, 17 Jun 2026 02:31:11 +0000CRITICAL 9.8: libvncclient/cursor.c in LibVNCServer through 0.9.12 has a HandleCursorShape integer overflow and heap-based buffer overflow via a large height or width value. NOTE: this may overlap CVE-2019-15690.