TI-2021-08442 Aliases CVE-2021-26807 GHSA-wcjf-j4g2-qj96

GalaxyClient version 2.0.28.9 loads unsigned DLLs such as zlib1.dll, libgcc_s_dw2-1.dll…

LOW 35CWE-426Published 2021-04-30 · Updated 2024-08-03

Key facts

Attack vector: Local
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-426.

Summary

GalaxyClient version 2.0.28.9 loads unsigned DLLs such as zlib1.dll, libgcc_s_dw2-1.dll and libwinpthread-1.dll from PATH, which allows an attacker to potentially run code locally through unsigned DLL loading.

Why it matters now

EPSS 0.0048 41st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:gog:galaxy:2.0.28.9:::::windows::	2.0.28.9	Vulnerable	GOG.COM

cpe:2.3:a:gog:galaxy:2.0.28.9:*:*:*:*:windows:*:* Versions 2.0.28.9 Vulnerable ·GOG.COM

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-26807
2026-10-03 Alias added: GHSA-wcjf-j4g2-qj96

References

Exploit 1

https://illuminati.services/2021/04/29/cve-2021-26807-gog-galaxy-v2-0-35-dll-load-order-hijacking/

Advisory 1

https://www.gog.com

TI-2020-05946 GOG Galaxy GalaxyClientService Privilege Escalation CVSS 3.1HIGH 8.8
TI-2020-12225 An issue was discovered in GOG Galaxy Client 2.0.17. CVSS 3.1HIGH 7.8
TI-2020-12226 An issue was discovered in GOG Galaxy Client 2.0.17. CVSS 3.1HIGH 7.8
TI-2022-13295 An exploitable local privilege escalation vulnerability exists in GOG Galaxy 2.0.46. CVSS 3.1HIGH 7.8
TI-2020-15055 The client (aka GalaxyClientService.exe) in GOG GALAXY through 2.0.41 (as of 12:58 AM… CVSS 3.1HIGH 7.8
TI-2019-11612 An exploitable local privilege escalation vulnerability exists in the GalaxyClientService… CVSS 3.1HIGH 7.8

See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences