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CVE-2020-14400

26
FAUCET Score

CVE-2020-14400 describes an issue in LibVNCServer before version 0.9.13, where byte-aligned data is accessed via uint16_t pointers in libvncserver/translate.c, affecting products from Canonical, Debian, LibVNCServer Project, and OpenSUSE. This vulnerability is rated High severity (CVSS 7.5), indicating a network-exploitable attack with low complexity and potential for high availability impact, though third parties do not consider it a true vulnerability due to the lack of a known exploitation path or trust boundary crossing. There is no evidence of active exploitation, no public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage, suggesting a low immediate threat.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.9.13CPE matchmatch criteria
cpe:2.3:a:libvncserver_project:libvncserver:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
15.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
15.2CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.84%
Probability of exploitation in next 30 days
EPSS Percentile
85.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0284 is in the 74th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2020-14400Low

libvncserver: byte-aligned data is accessed through uint16_t pointers in libvncserver/translate.c

Jun 17, 2020

References

lists.opensuse.org / opensuse-security-announce/2020-07/msg00033.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2020-07/msg00055.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2020-07/msg00066.html
Mailing ListThird Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
github.com / LibVNC/libvncserver/commit/53073c8d7e232151ea2ecd8a1243124121e10e2d
Patch
github.com / LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13
Release Notes
lists.debian.org / debian-lts-announce/2020/06/msg00035.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2020/08/msg00045.html
Mailing ListThird Party Advisory
usn.ubuntu.com / 4434-1
Third Party Advisory