---
title: "CVE-2016-0099: Buffer Copy without Checking Size of Input | CubePath"
description: "The Secondary Logon Service in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold…"
language: en
source: https://cubepath.com/security/cve/CVE-2016-0099
---

# CVE-2016-0099: Buffer Copy without Checking Size of Input | CubePath

## Description

The Secondary Logon Service in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, and Windows 10 Gold and 1511 does not properly process request handles, which allows local users to gain privileges via a crafted application, aka "Secondary Logon Elevation of Privilege Vulnerability."

Official description from the CVE record, published by microsoft. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2016-0099)

## Key data

### CVSS 3.1 High 7.8

Score published by CISA-ADP in the CVE record.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

| Metric                 | Value     | What it means                                                                             |
| ---------------------- | --------- | ----------------------------------------------------------------------------------------- |
| Attack vector          | Local     | The attacker needs local access to the system, or to trick a user into running something. |
| Attack complexity      | Low       | No special conditions are needed. The attack can be repeated at will.                     |
| Privileges required    | Low       | A basic user account is needed.                                                           |
| User interaction       | None      | No action from any user is needed.                                                        |
| Scope                  | Unchanged | The impact stays within the vulnerable component.                                         |
| Confidentiality impact | High      | Serious or total effect on the secrecy of data.                                           |
| Integrity impact       | High      | Serious or total effect on the trustworthiness of data.                                   |
| Availability impact    | High      | Serious or total effect on availability.                                                  |

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) .

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.37045 (37.0% probability)

Percentile

98.5%

Scores of

Nov 10, 2026

Model

v2026.06.15

### CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.

Name in the catalog

Microsoft Windows Secondary Logon Service Privilege Escalation Vulnerability

Added to the catalog

Mar 3, 2022

Federal due date

Mar 24, 2022

Ransomware campaigns

Known use

### CISA assessment as of Feb 10, 2025

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation

Recorded by CISA as active

Automatable

no

Technical impact

total

### Weakness (CWE)

CWE catalog version 5.0.

CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license.

- [CWE-120](https://cwe.mitre.org/data/definitions/120.html) Buffer Copy without Checking Size of Input

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [40107](https://www.exploit-db.com/exploits/40107/)  (exploit-db.com) exploit
- [39719](https://www.exploit-db.com/exploits/39719/)  (exploit-db.com) exploit
- [39809](https://www.exploit-db.com/exploits/39809/)  (exploit-db.com) exploit
- [84034](http://www.securityfocus.com/bid/84034)  (securityfocus.com) vdb-entry
- [1035210](http://www.securitytracker.com/id/1035210)  (securitytracker.com) vdb-entry
- [MS16-032](https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-032)  (docs.microsoft.com) vendor-advisory
- [39574](https://www.exploit-db.com/exploits/39574/)  (exploit-db.com) exploit

## Timeline

1. ID reserved Dec 4, 2015
2. Record published Mar 9, 2016
3. Added to CISA KEV Mar 3, 2022
4. Record last updated Oct 21, 2025

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:58 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)