CVE-2003-0110

The Winsock Proxy service in Microsoft Proxy Server 2.0 and the Microsoft Firewall service in Internet Security and Acceleration (ISA) Server 2000 allow remote attackers to cause a denial of service (CPU consumption or packet storm) via a spoofed, malformed packet to UDP port 1745.

Published: 2003-05-05 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2003-0110 is rated Moderate Risk (52.4/100): CVSS Medium severity, with high exploitation likelihood (EPSS 17.97%, 97th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2003-0110

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 2026-06-15 19.46% 17.97% -1.49%
2 2025-03-30 19.85% 19.46% -0.39%
3 2025-03-29 — 19.85% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2003-0110

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-2003-0110

Affected software / configurations for CVE-2003-0110

Vendor Product Version Raw CPE
microsoft isa_server 2000 cpe:2.3:a:microsoft:isa_server:2000:*:*:*:*:*:*:*
microsoft isa_server 2000 cpe:2.3:a:microsoft:isa_server:2000:fp1:*:*:*:*:*:*
microsoft isa_server 2000 cpe:2.3:a:microsoft:isa_server:2000:sp1:*:*:*:*:*:*
microsoft proxy_server 2.0 cpe:2.3:a:microsoft:proxy_server:2.0:*:*:*:*:*:*:*
microsoft proxy_server 2.0 cpe:2.3:a:microsoft:proxy_server:2.0:sp1:*:*:*:*:*:*

References for CVE-2003-0110

cvelogic Threat Intelligence