CVE-2002-1973

Exp

Buffer overflow in CHttpServer::OnParseError in the ISAPI extension (Isapi.cpp) when built using Microsoft Foundation Class (MFC) static libraries in Visual C++ 5.0, and 6.0 before SP3, as used in multiple products including BadBlue, allows remote attackers to cause a denial of service (access violation and crash) and possibly execute arbitrary code via a long query string that causes a parsing error.

Published: 2002-12-31 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2002-1973 is rated High Exploit Risk (84.3/100): CVSS High severity, with high exploitation likelihood (EPSS 60.24%, 98th percentile). 3 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +10.82% over the last day, indicating growing attacker interest. 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-2002-1973

EDB-ID Source Kind Published Link
21601 exploit_db edb 2002-07-08 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2002-1973

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 2025-03-30 49.42% 60.24% +10.82%
2 2025-03-29 60.24% 49.42% -10.82%
3 2025-03-17 — 60.24% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2002-1973

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/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:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2002-1973

Affected software / configurations for CVE-2002-1973

Vendor Product Version Raw CPE
microsoft foundation_class_library 7.0 cpe:2.3:a:microsoft:foundation_class_library:7.0:*:*:*:*:*:*:*
working_resources_inc. badblue personal_1.7.3 cpe:2.3:a:working_resources_inc.:badblue:personal_1.7.3:*:*:*:*:*:*:*

References for CVE-2002-1973

cvelogic Threat Intelligence