# CVE-2026-83719: Microsoft Windows Servicing Stack Updates buffer over-read

Source: https://junglewise.ai/threats/cve-2026-83719-buffer-over-read-in-servicing-stack-updates-allows-an-authorized  
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-2026-83719 · Severity: medium · CVSS 5.5 · Published 2026-10-13

Windows Servicing Stack Updates, a core Windows maintenance component, contains a buffer over-read vulnerability that allows an authorized local user to read sensitive data from system memory. While exploitation requires local access and user privileges, a successful attack could expose confidential information such as cryptographic keys or other sensitive data stored in memory.

Technologies: [Microsoft Windows Servicing Stack Updates](https://junglewise.ai/threats/technologies/windows-servicing-stack-updates). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-83719 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-83719 being exploited in the wild.

**How severe is CVE-2026-83719?** Medium severity, with a CVSS score of 5.5, published 13 October 2026.

**Which products and versions are affected?** Microsoft Windows Servicing Stack Updates <UNKNOWN>.

**Is there a fix for CVE-2026-83719?** 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-2026-83719 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-83719?** Check whether you run Microsoft Windows Servicing Stack Updates at an affected version. 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 buffer over-read flaw exists in Windows Servicing Stack Updates that permits an authenticated local attacker to read out-of-bounds memory. The vulnerability requires local system access and elevated or user-level privileges to trigger. Successful exploitation results in information disclosure from kernel or process memory.

## Affected products

- Microsoft Windows Servicing Stack Updates <UNKNOWN>

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83719](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83719)

## Related threats

- [Microsoft Servicing Stack Updates privilege escalation](https://junglewise.ai/threats/cve-2026-88235-unintended-proxy-or-intermediary-confused-deputy-in-servicing)
- [Microsoft Servicing Stack Updates heap buffer overflow](https://junglewise.ai/threats/cve-2026-83863-heap-based-buffer-overflow-in-servicing-stack-updates-allows-an)