HOMEVULNERABILITIESCVE-2020-24574
HIGH

CVE-2020-24574

CWE-798Published: August 21, 2020· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

The client (aka GalaxyClientService.exe) in GOG GALAXY through 2.0.41 (as of 12:58 AM Eastern, 9/26/21) allows local privilege escalation from any authenticated user to SYSTEM by instructing the Windows service to execute arbitrary commands. This occurs because the attacker can inject a DLL into GalaxyClient.exe, defeating the TCP-based "trusted client" protection mechanism.

NVD Source

Technical Analysis

CVE-2020-24574 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

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 7.8.

CVSS v3.1 Vector Breakdown

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

Affected Vendors & Products

gog1 product(s)
galaxy
Source: NVD CPE · 1 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

ADVISORYhttps://github.com/jtesta/gog_galaxy_client_service_poc
ADVISORYhttps://github.com/jtesta/gog_galaxy_client_service_poc/issues/1#issuecomment-926932218
ADVISORYhttps://www.gog.com/galaxy
ADVISORYhttps://www.positronsecurity.com/blog/2020-08-13-gog-galaxy_client-local-privilege-escalation_deuce/
ADVISORYhttps://github.com/jtesta/gog_galaxy_client_service_poc
ADVISORYhttps://github.com/jtesta/gog_galaxy_client_service_poc/issues/1#issuecomment-926932218
ADVISORYhttps://www.gog.com/galaxy
ADVISORYhttps://www.positronsecurity.com/blog/2020-08-13-gog-galaxy_client-local-privilege-escalation_deuce/

All References (8)

→
https://github.com/jtesta/gog_galaxy_client_service_pocExploit · Third Party Advisory
→
https://github.com/jtesta/gog_galaxy_client_service_poc/issues/1#issuecomment-926932218Issue Tracking · Third Party Advisory
→
https://www.gog.com/galaxyVendor Advisory
→
https://www.positronsecurity.com/blog/2020-08-13-gog-galaxy_client-local-privilege-escalation_deuce/Exploit · Third Party Advisory
→
https://github.com/jtesta/gog_galaxy_client_service_pocExploit · Third Party Advisory
→
https://github.com/jtesta/gog_galaxy_client_service_poc/issues/1#issuecomment-926932218Issue Tracking · Third Party Advisory
→
https://www.gog.com/galaxyVendor Advisory
→
https://www.positronsecurity.com/blog/2020-08-13-gog-galaxy_client-local-privilege-escalation_deuce/Exploit · Third Party Advisory

Quick Facts

CVE IDCVE-2020-24574
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-798
CISA KEVNo
Affected1 vendor(s)
PublishedAug 21, 2020

Related CVEs (CWE-798)

CVE-2019-0022
10.0
CVE-2018-0222
10.0
CVE-2014-9198
10.0
CVE-2012-6428
10.0
CVE-2017-2343
10.0
CVE-2019-0020
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-24574 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.
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