Microsoft Windows Vista SP2 up to Server 2016 Common Log File System Driver Memory memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability has been found in Microsoft Windows (Operating System) and classified as critical. Affected by this vulnerability is an unknown part of the component Common Log File System Driver. The manipulation with an unknown input leads to a memory corruption vulnerability (Memory). The CWE definition for the vulnerability is CWE-119. The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was disclosed 11/08/2016 as MS16-134 as confirmed bulletin (Technet). The advisory is shared at This vulnerability is known as CVE-2016-0026 since 12/04/2015. An attack has to be approached locally. A single authentication is necessary for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/30/2022). The advisory points out:

Elevation of privilege vulnerabilities exist when the Windows Common Log File System (CLFS) driver improperly handles objects in memory. An attacker who successfully exploited the vulnerabilities could run processes in an elevated context.

The vulnerability scanner Nessus provides a plugin with the ID 94635 (MS16-134: Security Update for Common Log File System Driver (3193706)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins. The commercial vulnerability scanner Qualys is able to test this issue with plugin 91299 (Microsoft Windows Common Log File System Driver Elevation of Privilege Vulnerability (MS16-134)). The advisory illustrates:

To exploit the vulnerabilities, an attacker would first have to log on to the system, and then run a specially crafted application to take control over the affected system.

Applying the patch MS16-134 is able to eliminate this problem. The bugfix is ready for download at A possible mitigation has been published immediately after the disclosure of the vulnerability. The bulletin contains the following remark:

The security update addresses the vulnerabilities by correcting how CLFS handles objects in memory

The vulnerability is also documented in the vulnerability database at Tenable (94635). The entries 93398, 93399, 93400 and 93401 are pretty similar.






  • commercial

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
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NVD Base Score: 7.8
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Name: Memory
Class: Memory corruption / Memory
CWE: CWE-119
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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Current Price Estimation: 🔍


Nessus ID: 94635
Nessus Name: MS16-134: Security Update for Common Log File System Driver (3193706)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 802074
OpenVAS Name: Microsoft Windows Common Log File System Driver Elevation of Privilege Vulnerability (3193706)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Recommended: Patch
Status: 🔍

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Patch: MS16-134


12/04/2015 🔍
11/08/2016 +340 days 🔍
11/08/2016 +0 days 🔍
11/08/2016 +0 days 🔍
11/09/2016 +1 days 🔍
11/10/2016 +1 days 🔍
09/30/2022 +2150 days 🔍



Advisory: MS16-134
Status: Confirmed

CVE: CVE-2016-0026 (🔍)

SecurityTracker: 1037252
SecurityFocus: 93998 - Microsoft Windows CVE-2016-0026 Local Privilege Escalation Vulnerability

scip Labs:
See also: 🔍


Created: 11/09/2016 10:14 AM
Updated: 09/30/2022 07:42 AM
Changes: 11/09/2016 10:14 AM (74), 04/07/2017 01:22 PM (12), 09/30/2022 07:35 AM (5), 09/30/2022 07:42 AM (1)
Complete: 🔍


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