HOMEVULNERABILITIESCVE-2018-8786
CRITICAL

CVE-2018-8786

CWE-680Published: November 29, 2018· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

FreeRDP prior to version 2.0.0-rc4 contains an Integer Truncation that leads to a Heap-Based Buffer Overflow in function update_read_bitmap_update() and results in a memory corruption and probably even a remote code execution.

NVD Source

Technical Analysis

CVE-2018-8786 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Canonical1 product(s)
ubuntu linux
Debian1 product(s)
debian linux
Fedora1 product(s)
fedora
FreeRDP1 product(s)
freerdp
Red Hat6 product(s)
enterprise linux desktopenterprise linux serverenterprise linux server ausenterprise linux server eusenterprise linux server tusenterprise linux workstation
Source: NVD CPE · 14 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/FreeRDP/FreeRDP/commit/445a5a42c500ceb80f8fa7f2c11f3682538033f3
PATCHhttps://github.com/FreeRDP/FreeRDP/commit/445a5a42c500ceb80f8fa7f2c11f3682538033f3
ADVISORYhttp://www.securityfocus.com/bid/106938
ADVISORYhttps://access.redhat.com/errata/RHSA-2019:0697
ADVISORYhttps://lists.debian.org/debian-lts-announce/2019/02/msg00015.html
ADVISORYhttps://research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/
ADVISORYhttps://usn.ubuntu.com/3845-1/
ADVISORYhttps://usn.ubuntu.com/3845-2/
ADVISORYhttp://www.securityfocus.com/bid/106938
ADVISORYhttps://access.redhat.com/errata/RHSA-2019:0697
ADVISORYhttps://lists.debian.org/debian-lts-announce/2019/02/msg00015.html
ADVISORYhttps://research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/
ADVISORYhttps://usn.ubuntu.com/3845-1/
ADVISORYhttps://usn.ubuntu.com/3845-2/

All References (16)

→
http://www.securityfocus.com/bid/106938Third Party Advisory · VDB Entry
→
https://access.redhat.com/errata/RHSA-2019:0697Third Party Advisory
→
https://github.com/FreeRDP/FreeRDP/commit/445a5a42c500ceb80f8fa7f2c11f3682538033f3Patch · Vendor Advisory
→
https://lists.debian.org/debian-lts-announce/2019/02/msg00015.htmlMailing List · Third Party Advisory
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YVJKO2DR5EY4C4QZOP7SNNBEW2JW6FHX/
→
https://research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/Exploit · Third Party Advisory
→
https://usn.ubuntu.com/3845-1/Third Party Advisory
→
https://usn.ubuntu.com/3845-2/Third Party Advisory
→
http://www.securityfocus.com/bid/106938Third Party Advisory · VDB Entry
→
https://access.redhat.com/errata/RHSA-2019:0697Third Party Advisory
→
https://github.com/FreeRDP/FreeRDP/commit/445a5a42c500ceb80f8fa7f2c11f3682538033f3Patch · Vendor Advisory
→
https://lists.debian.org/debian-lts-announce/2019/02/msg00015.htmlMailing List · Third Party Advisory
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YVJKO2DR5EY4C4QZOP7SNNBEW2JW6FHX/
→
https://research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/Exploit · Third Party Advisory
→
https://usn.ubuntu.com/3845-1/Third Party Advisory

Quick Facts

CVE IDCVE-2018-8786
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-680
CISA KEVNo
Affected5 vendor(s)
PublishedNov 29, 2018

Related CVEs (CWE-680)

CVE-2018-8795
9.8
CVE-2018-8794
9.8
CVE-2020-13576
9.8
CVE-2021-21783
9.8
CVE-2025-54952
9.8
CVE-2021-21832
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-8786 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2018-8786·NVD