# CVE-2026-77495: Microsoft Windows Imaging Component heap buffer overflow

Source: https://junglewise.ai/threats/cve-2026-77495-microsoft-windows-imaging-component-heap-buffer-overflow  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-08. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-77495 · Severity: high · CVSS 8.8 · Published 2026-09-08

Windows Imaging Component is a core system library used to process image files in Windows. A heap buffer overflow vulnerability allows an attacker to execute arbitrary code remotely by sending a specially crafted image file or network request, potentially compromising system security and enabling malware installation.

Technologies: [Microsoft Windows Imaging Component](https://junglewise.ai/threats/technologies/windows-imaging-component). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-77495 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-77495 being exploited in the wild.

**How severe is CVE-2026-77495?** High severity, with a CVSS score of 8.8, published 8 September 2026.

**Which products and versions are affected?** Microsoft Windows Imaging Component.

**Is there a fix for CVE-2026-77495?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-77495 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-77495?** Check whether you run Microsoft Windows Imaging Component. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A heap-based buffer overflow exists in the Windows Imaging Component when processing malformed or oversized image data. The vulnerability can be triggered over a network without requiring authentication or user interaction on vulnerable systems. An attacker can exploit this flaw to corrupt heap memory and achieve arbitrary code execution with the privileges of the affected process, potentially leading to full system compromise. A patch has been released by Microsoft as part of their regular security updates.

## Affected products

- Microsoft Windows Imaging Component

## Timeline

- 2026-09-08: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77495](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77495)

## Related threats

- [Windows Imaging Component heap overflow allows network code execution](https://junglewise.ai/threats/cve-2026-96164-heap-based-buffer-overflow-in-windows-imaging-component-allows-an)
- [Windows Imaging Component out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-96859-out-of-bounds-read-in-windows-imaging-component-allows-an)
- [Windows Imaging Component heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-77496-heap-based-buffer-overflow-in-windows-imaging-component-allows-an)
- [Windows Imaging Component heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-69886-heap-based-buffer-overflow-in-windows-imaging-component-allows-an)
- [Microsoft Windows Imaging Component heap buffer overflow](https://junglewise.ai/threats/cve-2026-83992-microsoft-windows-imaging-component-heap-buffer-overflow)