CVE-2025-53766 GDI+ Remote Code Execution Vulnerability

Critical 9.8 Published 12 Aug 2025 Updated 13 Feb 2026

Heap-based buffer overflow in Windows GDI+ allows remote attackers to execute arbitrary code over the network.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-53766?

CVE-2025-53766 is a critical memory corruption vulnerability in Microsoft 365 Copilot, published on 12 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code over a network.

Weakness: CWE-122

Which versions are affected by CVE-2025-53766?

It affects 17 products.

Products include Microsoft 365 Copilot, Microsoft Office, Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21h2 and 11 more.

How do I fix CVE-2025-53766?

No fix has been published for CVE-2025-53766 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-53766 being exploited?

There is no known exploitation of CVE-2025-53766 in the wild and no public exploit code.

All Microsoft 365 Copilot vulnerabilities

Sources

Also known as GHSA-v6m7-jpjm-gvwj.