// For flags

CVE-2005-2827

Microsoft Windows Server 2000 Kernel - APC Data-Free Local Escalation (MS05-055)

Severity Score

7.8
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

The thread termination routine in the kernel for Windows NT 4.0 and 2000 (NTOSKRNL.EXE) allows local users to modify kernel memory and execution flow via steps in which a terminating thread causes Asynchronous Procedure Call (APC) entries to free the wrong data, aka the "Windows Kernel Vulnerability."

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2005-09-07 CVE Reserved
  • 2005-12-14 CVE Published
  • 2006-01-05 First Exploit
  • 2024-08-07 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Microsoft
Search vendor "Microsoft"
Windows 2000
Search vendor "Microsoft" for product "Windows 2000"
*-
Affected
Microsoft
Search vendor "Microsoft"
Windows 2000
Search vendor "Microsoft" for product "Windows 2000"
*sp1
Affected
Microsoft
Search vendor "Microsoft"
Windows 2000
Search vendor "Microsoft" for product "Windows 2000"
*sp2
Affected
Microsoft
Search vendor "Microsoft"
Windows 2000
Search vendor "Microsoft" for product "Windows 2000"
*sp3
Affected
Microsoft
Search vendor "Microsoft"
Windows 2000
Search vendor "Microsoft" for product "Windows 2000"
*sp4
Affected
Microsoft
Search vendor "Microsoft"
Windows Nt
Search vendor "Microsoft" for product "Windows Nt"
4.0
Search vendor "Microsoft" for product "Windows Nt" and version "4.0"
-
Affected