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Vulnerability record · CVE-2020-14399 · published 17 June 2020

CVE-2020-14399: Libvncserver project libvncserver vulnerability

LLibvncserver Project · Libvncserver

An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c. NOTE: there is reportedly "no trust boundary crossed.

7.5 CVSS 3.1 High EPSS 2.8% · top 14.1%
7.5CVSS 3.1 base score, v2 5.0
2.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
18References
17 Jun 2026Last modified by NVD

Description

An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c. NOTE: there is reportedly "no trust boundary crossed.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.html Mailing ListThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1860354 Issue TrackingPatchThird Party Advisory
https://github.com/LibVNC/libvncserver/commit/23e5cbe6b090d7f22982aee909a6a618174d3c2d Patch
https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13 Release Notes
https://lists.debian.org/debian-lts-announce/2020/06/msg00035.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00045.html Mailing ListThird Party Advisory
https://usn.ubuntu.com/4434-1/ Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.html Mailing ListThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1860354 Issue TrackingPatchThird Party Advisory
https://github.com/LibVNC/libvncserver/commit/23e5cbe6b090d7f22982aee909a6a618174d3c2d Patch
https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13 Release Notes
https://lists.debian.org/debian-lts-announce/2020/06/msg00035.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00045.html Mailing ListThird Party Advisory
https://usn.ubuntu.com/4434-1/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-14399), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.