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CVE-2020-4033

18
FAUCET Score

CVE-2020-4033 is an out-of-bounds read vulnerability in FreeRDP versions prior to 2.1.2, affecting FreeRDP-based clients with color depth less than 32. This medium-severity vulnerability (CVSS 6.5) can be exploited remotely with low complexity, potentially leading to information disclosure and denial of service. While no public exploit code or active exploitation has been observed, and community discussion is minimal, organizations using affected FreeRDP versions should upgrade to 2.1.2 or later to mitigate the risk.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.1.2CPE matchmatch criteria
cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*
31CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
32CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
15.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:esm:*:*:*

CVSS Data

CVSS version used by this source: 3.1

3.1LOW

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
1.6
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.84%
Probability of exploitation in next 30 days
EPSS Percentile
76.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0184 is in the 64th percentile among its peer group of 23,723 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 0.4 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 (3)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: freerdp-2:2.2.0-1.el8
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: freerdp

Vendor Advisories (1)

redhatCVE-2020-4033Low

freerdp: out-of-bounds read in RLEDECOMPRESS

Jun 22, 2020

References

lists.opensuse.org / opensuse-security-announce/2020-07/msg00080.html
Mailing ListThird Party Advisory
github.com / FreeRDP/FreeRDP/commit/0a98c450c58ec150e44781c89aa6f8e7e0f571f5
PatchThird Party Advisory
github.com / FreeRDP/FreeRDP/security/advisories/GHSA-7rhj-856w-82p8
MitigationThird Party Advisory
lists.debian.org / debian-lts-announce/2023/10/msg00008.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/6Y35HBHG2INICLSGCIKNAR7GCXEHQACQ
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/XOZLH35OJWIQLM7FYDXAP2EAUBDXE76V
usn.ubuntu.com / 4481-1
Third Party Advisory
freerdp.com / 2020/06/22/2_1_2-released
Release NotesVendor Advisory