# CVE-2026-96989: Microsoft Windows Secondary Logon out-of-bounds read

Source: https://junglewise.ai/threats/cve-2026-96989-out-of-bounds-read-in-secondary-logon-allows-an-authorized  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-96989 · Severity: medium · CVSS 5.5 · Published 2026-11-10

Microsoft Windows Secondary Logon, a system component that manages elevated privilege sessions, contains an out-of-bounds read vulnerability. An authorized local attacker could exploit this flaw to read sensitive information from system memory, potentially exposing credentials or other confidential data.

Technologies: [Microsoft Windows](https://junglewise.ai/threats/technologies/windows). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-96989 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-96989 being exploited in the wild.

**How severe is CVE-2026-96989?** Medium severity, with a CVSS score of 5.5, published 10 November 2026.

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

**Is there a fix for CVE-2026-96989?** 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-2026-96989 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-96989?** Check whether you run Microsoft Windows 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

An out-of-bounds read in the Secondary Logon component allows an authenticated local attacker to disclose memory contents. The vulnerability requires local access and prior authentication; exploitation does not grant code execution but enables information disclosure through memory disclosure.

## Affected products

- Microsoft Windows <UNKNOWN>

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96989](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96989)

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