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CVE-2020-13396

25
FAUCET Score

CVE-2020-13396 is an out-of-bounds read vulnerability in FreeRDP versions prior to 2.1.1, specifically within the ntlm_read_ChallengeMessage function, affecting products like Canonical, Debian, FreeRDP, and OpenSUSE. It carries a high CVSS score of 7.1, indicating a remotely exploitable flaw with low attack complexity that could lead to high confidentiality impact and low availability impact. Despite its severity, there is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.1.1CPE matchmatch criteria
cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:esm:*:*:*
19.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
20.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.34%
Probability of exploitation in next 30 days
EPSS Percentile
81.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0234 is in the 80th percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 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 (4)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: freerdp-0:2.1.1-2.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: freerdp-2:2.1.1-1.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: vinagre-0:3.22.0-23.el8
View patch

Vendor Advisories (1)

redhatCVE-2020-13396Moderate

freerdp: Out-of-bounds read in ntlm_read_ChallengeMessage in winpr/libwinpr/sspi/NTLM/ntlm_message.c.

May 22, 2020

References

lists.opensuse.org / opensuse-security-announce/2020-07/msg00080.html
Third Party Advisory
github.com / FreeRDP/FreeRDP/commit/48361c411e50826cb602c7aab773a8a20e1da6bc
PatchThird Party Advisory
github.com / FreeRDP/FreeRDP/commit/8fb6336a4072abcee8ce5bd6ae91104628c7bb69
Third Party Advisory
github.com / FreeRDP/FreeRDP/compare/2.1.0...2.1.1
Release NotesThird Party Advisory
lists.debian.org / debian-lts-announce/2020/08/msg00054.html
Third Party Advisory
lists.debian.org / debian-lts-announce/2023/10/msg00008.html
Mailing ListThird Party Advisory
usn.ubuntu.com / 4379-1
Third Party Advisory
usn.ubuntu.com / 4382-1
Third Party Advisory