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CVE-2020-14404

16
FAUCET Score

CVE-2020-14404 is an out-of-bounds access vulnerability in LibVNCServer versions prior to 0.9.13, specifically within the libvncserver/rre.c component when handling encodings. This medium-severity vulnerability (CVSS 5.4) allows an authenticated attacker to achieve low impact on confidentiality and availability over the network with low attack complexity. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.9.12CPE matchmatch criteria
cpe:2.3:a:libvnc_project:libvncserver:*:*:*:*:*:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.4MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.59%
Probability of exploitation in next 30 days
EPSS Percentile
73.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0159 is in the 86th percentile among its peer group of 21,977 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (5)

github_advisorypatch availablevia nvd_reference
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libvncserver
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: vino
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: libvncserver
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: vino

Vendor Advisories (1)

redhatCVE-2020-14404Low

libvncserver: libvncserver/rre.c allows out-of-bounds access via encodings

Jun 17, 2020

References

cert-portal.siemens.com / productcert/pdf/ssa-390195.pdf
PatchThird Party Advisory
github.com / LibVNC/libvncserver/commit/74e8a70f2c9a5248d6718ce443e07c7ed314dfff
PatchThird Party Advisory
github.com / LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13
Release NotesThird Party Advisory
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
usn.ubuntu.com / 4573-1
Third Party Advisory