# CVE-2026-69336: Microsoft Standard XPS heap buffer overflow

Source: https://junglewise.ai/threats/cve-2026-69336-microsoft-standard-xps-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-2026-69336 · Severity: high · CVSS 7.1 · Published 2026-09-08

Microsoft Standard XPS is a document processing component used to view and handle XPS (XML Paper Specification) files. A heap buffer overflow flaw allows an authorized user to execute arbitrary code and escalate privileges on a system or across a network, potentially leading to system compromise and data breach.

Technologies: [Microsoft Standard XPS](https://junglewise.ai/threats/technologies/standard-xps). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-69336 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-69336 being exploited in the wild.

**How severe is CVE-2026-69336?** High severity, with a CVSS score of 7.1, published 8 September 2026.

**Which products and versions are affected?** Microsoft Standard XPS.

**Is there a fix for CVE-2026-69336?** 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-2026-69336 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-69336?** Check whether you run Microsoft Standard XPS. 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 vulnerability exists in Microsoft Standard XPS due to insufficient bounds checking when processing malformed XPS documents. The flaw requires an attacker to be authenticated and have network access to the affected system. Successful exploitation allows privilege escalation and arbitrary code execution with system-level permissions. A patch is available through Microsoft's security updates.

## Affected products

- Microsoft Standard XPS

## Timeline

- 2026-09-08: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69336](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69336)

## Related threats

- [Microsoft Standard XPS integer underflow](https://junglewise.ai/threats/cve-2026-69824-microsoft-standard-xps-integer-underflow)
- [Microsoft Standard XPS out-of-bounds read](https://junglewise.ai/threats/cve-2026-69376-microsoft-standard-xps-out-of-bounds-read)
- [Microsoft Standard XPS out-of-bounds read](https://junglewise.ai/threats/cve-2026-69367-microsoft-standard-xps-out-of-bounds-read)
- [Microsoft Standard XPS out-of-bounds read](https://junglewise.ai/threats/cve-2026-69345-microsoft-standard-xps-out-of-bounds-read)
- [Microsoft Standard XPS heap buffer overflow](https://junglewise.ai/threats/cve-2026-69313-microsoft-standard-xps-heap-buffer-overflow)