An exploitable local privilege escalation vulnerability exists in the GalaxyClientService installed by GOG Galaxy.

published 2019-11-21 6y ago modified 2026-06-17 4mo ago also EUVD-2019-6498

cvss: 7.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 55%
public exploits: 0; none known

An exploitable local privilege escalation vulnerability exists in the GalaxyClientService installed by GOG Galaxy. Due to Improper Access Control, an attacker can send unauthenticated local TCP packets to the service to gain SYSTEM privileges in Windows system where GOG Galaxy software is installed. All GOG Galaxy versions before 1.2.60 and all corresponding versions of GOG Galaxy 2.0 Beta are affected.

Patch / fix

fixed in 1

gog galaxy 1.2.60

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Exploit prediction

0.75% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.2	AV:L/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness

CWE-306 Missing Authentication for Critical Functionality

References

support.gog.com /hc/en-us/articles/360025458833-GOG-GALAXY-2-0-updates-and-known-issues
release-notes, vendor-advisory
cqureacademy.com /cqure-labs/cqlabs-cve-2019-15511-broken-access-control-in-gog-galaxy
third-party-advisory, vendor-advisory

Sources

CVE List CVE-2019-15511
NVD CVE-2019-15511

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