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CVE-2018-8784

33
FAUCET Score

CVE-2018-8784 is a critical heap-based buffer overflow vulnerability in FreeRDP versions prior to 2.0.0-rc4, affecting products like canonical freerdp and ubuntu_linux. This flaw, located in the zgfx_decompress_segment() function, can lead to memory corruption and potentially remote code execution. With a CVSS score of 9.8, it is easily exploitable over the network with low attack complexity, allowing for full compromise of confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.2.0CPE matchmatch criteria
cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*
2.0.0CPE matchmatch criteria
cpe:2.3:a:freerdp:freerdp:2.0.0:rc1:*:*:*:*:*:*
2.0.0CPE matchmatch criteria
cpe:2.3:a:freerdp:freerdp:2.0.0:rc2:*:*:*:*:*:*
2.0.0CPE matchmatch criteria
cpe:2.3:a:freerdp:freerdp:2.0.0:rc3:*:*:*:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
7.29%
Probability of exploitation in next 30 days
EPSS Percentile
93.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0729 is in the 89th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2018-8784Moderate

freerdp: Heap-based buffer overflow in zgfx_decompress_segment() function

Oct 22, 2018

References

github.com / FreeRDP/FreeRDP/commit/17c363a5162fd4dc77b1df54e48d7bd9bf6b3be7
PatchVendor Advisory
research.checkpoint.com / reverse-rdp-attack-code-execution-on-rdp-clients
ExploitThird Party Advisory
usn.ubuntu.com / 3845-1
Third Party Advisory
securityfocus.com / bid/106938
Third Party AdvisoryVDB Entry