Which products and versions are affected by CVE-2003-0344?

Affected: Ie (Microsoft) versions 6.0; Internet Explorer (Microsoft) versions 5.01, 5.5, 6.0. The full list is in the CVE brief.

Is CVE-2003-0344 being exploited in the wild?

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

Is CVE-2003-0344 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-2003-0344?

Public exploit code is available.

Is there a fix for CVE-2003-0344?

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

How urgently should CVE-2003-0344 be patched?

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

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Vulnerability Intelligence

CVE-2003-0344

HighPublic exploit

Buffer overflow in Microsoft Internet Explorer 5.01, 5.5, and 6.0 allows remote attackers to execute arbitrary code via / (slash) characters in the Type property of an Object tag in a web page.

Published Jun 16, 2003 · Updated Apr 15, 2026

Key Facts

Patch immediately

CVE-2003-0344 is a high-severity vulnerability (CVSS 7.5 v2) affecting Ie (Microsoft), Internet Explorer (Microsoft).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 81% 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

7.5

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

EPSS (30-day exploit likelihood)

81%

Higher than 99.6% 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-2003-0344 brief as a PDF

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

Description

Buffer overflow in Microsoft Internet Explorer 5.01, 5.5, and 6.0 allows remote attackers to execute arbitrary code via / (slash) characters in the Type property of an Object tag in a web page.

Affected Products

4 affected entries in total

Product	Affected versions	Fixed in
IeMicrosoft	6.0	n/a
Internet ExplorerMicrosoft	5.01, 5.5, 6.0	n/a

Timeline

Publicly disclosed
Jun 16, 2003
Last updated
Apr 15, 2026

References

6 more references in the full CVE brief

FAQ

Common Questions.

Buffer overflow in Microsoft Internet Explorer 5.01, 5.5, and 6.0 allows remote attackers to execute arbitrary code via / (slash) characters in the Type property of an Object tag in a web page.
Affected: Ie (Microsoft) versions 6.0; Internet Explorer (Microsoft) versions 5.01, 5.5, 6.0. 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-2003-0344 Running On Your Attack Surface?

Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.