CVE-2002-1561

Exp

The RPC component in Windows 2000, Windows NT 4.0, and Windows XP allows remote attackers to cause a denial of service (disabled RPC service) via a malformed packet to the RPC Endpoint Mapper at TCP port 135, which triggers a null pointer dereference.

Published: 2003-04-02 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2002-1561 is rated High Exploit Risk (69.2/100): CVSS Medium severity, with high exploitation likelihood (EPSS 62.24%, 98th percentile). 5 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2002-1561

EDB-ID Source Kind Published Link
21952 exploit_db edb 2002-10-22 Exploit-DB ↗
21951 exploit_db edb 2002-10-22 Exploit-DB ↗
21954 exploit_db edb 2002-10-18 Exploit-DB ↗
21953 exploit_db edb 2002-10-18 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2002-1561

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-02-08 62.40% 62.24% -0.16%
2 2025-12-28 64.34% 62.40% -1.94%
3 2025-12-27 — 64.34% —

Full EPSS history (20 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2002-1561

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2002-1561

Affected software / configurations for CVE-2002-1561

Vendor Product Version Raw CPE
microsoft windows_2000 — cpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:*
microsoft windows_2000 — cpe:2.3:o:microsoft:windows_2000:*:sp1:*:*:*:*:*:*
microsoft windows_2000 — cpe:2.3:o:microsoft:windows_2000:*:sp2:*:*:*:*:*:*
microsoft windows_2000 — cpe:2.3:o:microsoft:windows_2000:*:sp3:*:*:*:*:*:*
microsoft windows_2000_terminal_services — cpe:2.3:o:microsoft:windows_2000_terminal_services:*:*:*:*:*:*:*:*
microsoft windows_2000_terminal_services — cpe:2.3:o:microsoft:windows_2000_terminal_services:*:sp1:*:*:*:*:*:*
microsoft windows_2000_terminal_services — cpe:2.3:o:microsoft:windows_2000_terminal_services:*:sp2:*:*:*:*:*:*
microsoft windows_2000_terminal_services — cpe:2.3:o:microsoft:windows_2000_terminal_services:*:sp3:*:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:*:enterprise_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:*:server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:*:terminal_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:*:workstation:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp1:enterprise_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp1:server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp1:terminal_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp1:workstation:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp2:enterprise_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp2:server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp2:terminal_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp2:workstation:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp3:enterprise_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp3:server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp3:terminal_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp3:workstation:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp4:enterprise_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp4:server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp4:terminal_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp4:workstation:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp5:enterprise_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp5:server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp5:terminal_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp5:workstation:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp6:enterprise_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp6:server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp6:terminal_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp6:workstation:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp6a:enterprise_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp6a:server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp6a:terminal_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp6a:workstation:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:*:64-bit:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:*:home:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:gold:professional:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:sp1:64-bit:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:sp1:home:*:*:*:*:*

References for CVE-2002-1561

cvelogic Threat Intelligence