CVE-2026-119937: Microsoft Streaming Service heap-based buffer overflow

CVE-2026-119937 · Severity: medium · CVSS 6.6 · Published 2026-11-10

Microsoft Streaming Service contains a heap-based buffer overflow vulnerability that allows an authorized attacker with physical access to elevate their privileges on the system. This could enable an attacker to gain administrative control or bypass security restrictions on affected devices.

Technologies: Microsoft Streaming Service. Vendors: Microsoft.

Quick answers

Is CVE-2026-119937 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-119937 being exploited in the wild.
How severe is CVE-2026-119937?
Medium severity, with a CVSS score of 6.6, published 10 November 2026.
Which products and versions are affected?
Microsoft Streaming Service.
Is there a fix for CVE-2026-119937?
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-2026-119937 attacked?
It is attacked with physical access.
Am I affected by CVE-2026-119937?
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, exploitable by an authorized attacker via physical access to the device. The vulnerability permits privilege escalation, giving an attacker elevated access beyond their current authorization level. A fix is available from Microsoft.

Affected products

  • Microsoft Streaming Service

Timeline

  • 2026-11-10: disclosed

References

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