CVE-2016-0049

MEDIUM

Microsoft Windows Kerberos - Authentication Bypass via Crafted KDC

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2016-0049. PoCs published by Nabeel Ahmed, JackOfMostTrades.

AI-analyzed exploit summary This is a detailed technical writeup describing a Kerberos security feature bypass vulnerability (CVE-2016-0049) that allows an attacker with physical access to bypass authentication on a domain-joined Windows system with BitLocker enabled. The exploit involves creating a rogue domain controller and manipulating Active Directory objects to trick the target system into accepting a new password.

Description

Kerberos in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, and Windows 10 Gold and 1511 does not properly validate password changes, which allows remote attackers to bypass authentication by deploying a crafted Key Distribution Center (KDC) and then performing a sign-in action, aka "Windows Kerberos Security Feature Bypass."

Exploits (2)

exploitdb WRITEUP VERIFIED
by Nabeel Ahmed · textlocalwindows
https://www.exploit-db.com/exploits/39442

This is a detailed technical writeup describing a Kerberos security feature bypass vulnerability (CVE-2016-0049) that allows an attacker with physical access to bypass authentication on a domain-joined Windows system with BitLocker enabled. The exploit involves creating a rogue domain controller and manipulating Active Directory objects to trick the target system into accepting a new password.

Classification
Writeup 90%
Attack Type
Auth Bypass
Complexity
Complex
Reliability
Reliable
Target: Windows 7 (domain-joined with BitLocker and cached credentials)
No auth needed
Prerequisites: Physical access to the target system · Target system is domain-joined with BitLocker enabled (no PIN/USB key) · Password caching enabled with cached credentials · Ability to create a rogue domain controller
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 51 stars
by JackOfMostTrades · poc
https://github.com/JackOfMostTrades/bluebox

This repository contains a proof-of-concept exploit for CVE-2015-6095, which allows bypassing the Windows login screen via domain authentication manipulation. It includes scripts to set up malicious DNS, KDC, LDAP, and NetBIOS servers to facilitate the attack.

Classification
Working Poc 95%
Attack Type
Auth Bypass
Complexity
Moderate
Reliability
Reliable
Target: Windows Domain Authentication (affected by MS15-122)
No auth needed
Prerequisites: Network access to the target machine · Ability to intercept or manipulate domain authentication traffic
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (5)

Core 5
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1034985
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/39442/
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/82535

Scores

CVSS v3 6.2
EPSS 0.1339
EPSS Percentile 95.9%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Details

CWE
CWE-255
Status published
Products (9)
microsoft/windows_10
microsoft/windows_10 1511
microsoft/windows_7
microsoft/windows_8.1
microsoft/windows_server_2008
microsoft/windows_server_2008 r2 sp1
microsoft/windows_server_2012
microsoft/windows_server_2012 r2
microsoft/windows_vista
Published Feb 10, 2016
Tracked Since Feb 18, 2026