Which products and versions are affected by CVE-2004-0120?

Affected: Windows 2000 (Microsoft); Windows 2003 Server (Microsoft) versions r2; Windows Xp (Microsoft). The full list is in the CVE brief.

Is CVE-2004-0120 being exploited in the wild?

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

Is CVE-2004-0120 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-2004-0120?

Public exploit code is available.

Is there a fix for CVE-2004-0120?

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

How urgently should CVE-2004-0120 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2004-0120

MediumPublic exploit

The Microsoft Secure Sockets Layer (SSL) library, as used in Windows 2000, Windows XP, and Windows Server 2003, allows remote attackers to cause a denial of service via malformed SSL messages.

Published Jun 1, 2004 · Updated Apr 15, 2026

Key Facts

Patch immediately

CVE-2004-0120 is a medium-severity vulnerability (CVSS 5.0 v2) affecting Windows 2000 (Microsoft), Windows 2003 Server (Microsoft), Windows Xp (Microsoft).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 51% 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 it is very likely to be exploited soon.

CVSS v2

5.0

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

EPSS (30-day exploit likelihood)

51%

Higher than 98.9% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2004-0120 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

The Microsoft Secure Sockets Layer (SSL) library, as used in Windows 2000, Windows XP, and Windows Server 2003, allows remote attackers to cause a denial of service via malformed SSL messages.

Affected Products

3 affected entries in total

Product	Affected versions	Fixed in
Windows 2000Microsoft	See advisory	n/a
Windows 2003 ServerMicrosoft	r2	n/a
Windows XpMicrosoft	See advisory	n/a

Timeline

Publicly disclosed
Jun 1, 2004
Last updated
Apr 15, 2026

References

5 more references in the full CVE brief

FAQ

Common Questions.

The Microsoft Secure Sockets Layer (SSL) library, as used in Windows 2000, Windows XP, and Windows Server 2003, allows remote attackers to cause a denial of service via malformed SSL messages.
Affected: Windows 2000 (Microsoft); Windows 2003 Server (Microsoft) versions r2; Windows Xp (Microsoft). 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 it is very likely to be exploited soon.

Is CVE-2004-0120 Running On Your Attack Surface?

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