Which products and versions are affected by CVE-2002-1973?

Affected: Foundation Class Library (Microsoft) versions 7.0; Badblue (Working Resources Inc.) versions personal_1.7.3. The full list is in the CVE brief.

Is CVE-2002-1973 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2002-1973 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2002-1973?

Public exploit code is available.

Is there a fix for CVE-2002-1973?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2002-1973 be patched?

Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

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WatchlistHigh

CVE-2002-1973Badblue Vulnerability

Published Dec 31, 2002 · Updated Apr 15, 2026

Key Facts

Patch immediately

CVE-2002-1973 is a high-severity vulnerability (CVSS 7.5 v2) affecting Foundation Class Library (Microsoft), Badblue (Working Resources Inc.).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 40% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Scores

CVSS v2

7.5

AV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS (30-day exploit likelihood)

40%

Higher than 98.6% of all scored CVEs

Exploit maturity

Proof of concept

ATLAS score

35/100

Publication score, see How it works

Exploitation Verdict

KEV listed

Not listed

Federal due date

None

No federal due date

Ransomware use

Not reported

Attributed actors

None named

Exploit & Defence Guidance

Exploit maturity

Proof of concept

Public exploit code

Proof-of-concept links

In-the-wild evidence

Reports of active use

Advisories And Exploit References

patch20020712 MFC Overflow Test Code

Description

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.

Affected Products

2 affected entries in total

Product	Affected versions	Fixed in
Foundation Class LibraryMicrosoft	7.0	n/a
BadblueWorking Resources Inc.	personal_1.7.3	n/a

Timeline

Publicly disclosed
Dec 31, 2002
Last updated
Apr 15, 2026

References

patch20020712 MFC Overflow Test Code
exploit20020711 MFC ISAPI Framework Buffer Overflow
exploitExploitDB-21601
exploit5188
other20020708 ALERT: Working Resources BadBlue #2 (DoS, Heap Overflow)

4 more references in the full CVE brief

FAQ

Common Questions.

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…
Affected: Foundation Class Library (Microsoft) versions 7.0; Badblue (Working Resources Inc.) versions personal_1.7.3. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Is CVE-2002-1973 On Your Attack Surface?

Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.