CVE-2015-2553

Microsoft Windows - Privilege Escalation via Sandboxed Mount Point Junction Mishandling

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2015-2553. PoCs published by Google Security Research.

AI-analyzed exploit summary The writeup details a security feature bypass in Windows 10 (build 10240) where a sandboxed process can bypass mitigations to create NTFS Mount Reparse Points by manipulating the process device map. The analysis includes the root cause, patch bypass mechanics, and a proof-of-concept demonstration.

Description

The kernel in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT Gold and 8.1, and Windows 10 mishandles junctions during mountpoint creation, which makes it easier for local users to gain privileges by leveraging certain sandbox access, aka "Windows Mount Point Elevation of Privilege Vulnerability."

Exploits (1)

exploitdb WRITEUP VERIFIED
by Google Security Research · textlocalwindows
https://www.exploit-db.com/exploits/38474

The writeup details a security feature bypass in Windows 10 (build 10240) where a sandboxed process can bypass mitigations to create NTFS Mount Reparse Points by manipulating the process device map. The analysis includes the root cause, patch bypass mechanics, and a proof-of-concept demonstration.

Classification
Writeup 95%
Attack Type
Other
Complexity
Moderate
Reliability
Reliable
Target: Windows 10 (build 10240)
No auth needed
Prerequisites: Low integrity/sandboxed process execution · Access to modify process device map
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (4)

Core 4
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1033805
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/38474/
Patch, Vendor Advisory vendor-advisory x_refsource_ms
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-111

Scores

EPSS 0.0326
EPSS Percentile 86.8%

Details

CWE
CWE-264
Status published
Products (11)
microsoft/windows_10
microsoft/windows_7
microsoft/windows_8
microsoft/windows_8.1
microsoft/windows_rt
microsoft/windows_rt_8.1
microsoft/windows_server_2008
microsoft/windows_server_2008 r2 sp1 (2 CPE variants)
microsoft/windows_server_2012
microsoft/windows_server_2012 r2
... and 1 more
Published Oct 14, 2015
Tracked Since Feb 18, 2026