# CVE-2016-0099: Microsoft Windows Secondary Logon Service Privilege Escalation Vulnerability

Source: https://junglewise.ai/threats/cve-2016-0099-microsoft-windows-secondary-logon-service-privilege-escalation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-03-03. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2016-0099 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2022-03-03

The Secondary Logon Service in Microsoft Windows fails to properly process request handles in memory, leading to a privilege escalation vulnerability. A local attacker can exploit this by running a crafted application to gain administrator-level privileges.

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

## Quick answers

**Is CVE-2016-0099 exploited in the wild?** Yes. CVE-2016-0099 is known to be exploited in the wild, first recorded on 3 March 2022. Treat it as urgent.

**How severe is CVE-2016-0099?** Critical severity, with a CVSS score of 7.8, published 3 March 2022.

**Which products and versions are affected?** Microsoft Windows Vista SP2; Microsoft Windows Server 2008 SP2, R2 SP1, 2012 Gold, 2012 R2; Microsoft Windows 7 SP1; Microsoft Windows 8.1 Gold; and 2 more.

**Is there a fix for CVE-2016-0099?** 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-2016-0099 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2016-0099?** Check whether you run Microsoft Windows. 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.

## Affected products

- Microsoft Windows Vista SP2
- Microsoft Windows Server 2008 SP2, R2 SP1, 2012 Gold, 2012 R2
- Microsoft Windows 7 SP1
- Microsoft Windows 8.1 Gold
- Microsoft Windows RT 8.1 Gold
- Microsoft Windows 10 Gold, 1511

## Timeline

- 2016-03-08: advisory: Microsoft Security Bulletin MS16-032 published
- 2022-03-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2022-03-03: disclosed: NVD publication date

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