What’s Vulnerable › Vulnerabilities

CVE-2020-11827

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-07-14 · updated 2026-06-17
• Weakness: CWE-732

Description

In GOG Galaxy 1.2.67, there is a service that is vulnerable to weak file/service permissions: GalaxyClientService.exe. An attacker can put malicious code in a Trojan horse GalaxyClientService.exe. After that, the attacker can re-start this service as an unprivileged user to escalate his/her privileges and run commands on the machine with SYSTEM rights.

Affected products

• GOG.COM GOG Galaxy: before 1.2.67 — fixed in 1.2.67

How to fix

Upgrade to a fixed version: GOG.COM GOG Galaxy 1.2.67. Check the vendor advisory for mitigations.

References

• https://fatihhcelik.blogspot.com/2020/04/gog-galaxy-desktop-app-local-privilege.html
• https://www.gog.com/galaxy
• https://fatihhcelik.blogspot.com/2020/04/gog-galaxy-desktop-app-local-privilege.html
• https://www.gog.com/galaxy

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