Which products and versions are affected by CVE-2009-1547?

Affected: Internet Explorer (Microsoft) versions 5.01-sp4, 6, 6-sp1, 7, 8; Windows 2000 (Microsoft); Windows 7 (Microsoft), among others. The full list is in the CVE brief.

Is CVE-2009-1547 being exploited in the wild?

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

Is CVE-2009-1547 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-2009-1547?

Public exploit code is available.

Is there a fix for CVE-2009-1547?

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

How urgently should CVE-2009-1547 be patched?

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

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CVE-2009-1547Internet Explorer Code Injection

Unspecified vulnerability in Microsoft Internet Explorer 5.01 SP4, 6, 6 SP1, and 7 allows remote attackers to execute arbitrary code via a crafted data stream header that triggers memory corruption, aka "Data Stream Header Corruption Vulnerability."

Published Oct 14, 2009 · Updated Apr 22, 2026

Key Facts

Patch immediately

CVE-2009-1547 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Internet Explorer (Microsoft), Windows 2000 (Microsoft), Windows 7 (Microsoft) and 4 more products.
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 37% 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 v3.1

8.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS (30-day exploit likelihood)

37%

Higher than 98.5% of all scored CVEs

Exploit maturity

Proof of concept

ATLAS score

40/100

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

Description

Affected Products

25 affected entries in total

Product	Affected versions	Fixed in
Internet ExplorerMicrosoft	5.01-sp4, 6, 6-sp1, 7, 8	n/a
Windows 2000Microsoft	See advisory	n/a
Windows 7Microsoft	See advisory	n/a
Windows Server 2003Microsoft	See advisory	n/a
Windows Server 2008Microsoft	See advisory	n/a

2 more affected products in the full CVE brief

Timeline

Publicly disclosed
Oct 14, 2009
Last updated
Apr 22, 2026

Weakness Type

CWE-94 Improper Control of Generation of Code ('Code Injection')

References

FAQ

Common Questions.

Unspecified vulnerability in Microsoft Internet Explorer 5.01 SP4, 6, 6 SP1, and 7 allows remote attackers to execute arbitrary code via a crafted data stream header that triggers memory corruption, aka "Data Stream Header Corruption Vulnerability."
Affected: Internet Explorer (Microsoft) versions 5.01-sp4, 6, 6-sp1, 7, 8; Windows 2000 (Microsoft); Windows 7 (Microsoft), among others. 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-2009-1547 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.