# CVE-2026-69970: Microsoft Streaming Service heap-based buffer overflow

Source: https://junglewise.ai/threats/cve-2026-69970-heap-based-buffer-overflow-in-microsoft-streaming-service-allows  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-69970 · Severity: high · CVSS 7 · Published 2026-10-13

Microsoft Streaming Service, a component of Microsoft's media infrastructure, contains a heap-based buffer overflow vulnerability that allows an authorized local attacker to execute arbitrary code with elevated privileges. An attacker with legitimate access to the system could exploit this flaw to gain administrative control, potentially compromising the entire host system and data it contains.

Technologies: [Microsoft Streaming Service](https://junglewise.ai/threats/technologies/streaming-service). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-69970 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-69970 being exploited in the wild.

**How severe is CVE-2026-69970?** High severity, with a CVSS score of 7, published 13 October 2026.

**Which products and versions are affected?** Microsoft Streaming Service.

**Is there a fix for CVE-2026-69970?** 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-2026-69970 attacked?** It is attacked with local access, in a hosted service.

**Am I affected by CVE-2026-69970?** Check whether you run Microsoft Streaming Service. 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 Microsoft Streaming Service that permits privilege escalation through memory corruption. The vulnerability requires local access and an authorized account; it is triggered through a heap buffer overflow condition in the service component, allowing an attacker to execute code at a higher privilege level than their current authorization.

## Affected products

- Microsoft Streaming Service

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69970](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69970)

## Related threats

- [Microsoft Streaming Service heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-119937-heap-based-buffer-overflow-in-microsoft-streaming-service-allows)
- [Microsoft Streaming Service integer overflow privilege escalation](https://junglewise.ai/threats/cve-2026-69966-integer-overflow-or-wraparound-in-microsoft-streaming-service)
- [Microsoft Streaming Service use after free privilege escalation](https://junglewise.ai/threats/cve-2026-69964-use-after-free-in-microsoft-streaming-service-allows-an)
- [Microsoft Streaming Service heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-69963-heap-based-buffer-overflow-in-microsoft-streaming-service-allows)
- [Microsoft Streaming Service Untrusted Pointer Dereference Vulnerability](https://junglewise.ai/threats/cve-2023-29360-microsoft-streaming-service-untrusted-pointer-dereference)