How severe is CVE-2009-1335?

CVE-2009-1335 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2009-1335 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-1335?

CVE-2009-1335 primarily affects Microsoft Internet Explorer. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-1335?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-1335 published?

CVE-2009-1335 was published on 2009-04-17 and last updated on 2026-06-16.

CVE-2009-1335

CVE-2009-1335 is a medium-severity vulnerability in Microsoft Internet Explorer with a CVSS 2.0 base score of 4.3. Its EPSS exploit-prediction score of 16% places it in the 96th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 16% (96th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Internet Explorer
Published: 2009-04-17
Last modified: 2026-06-16

Description

Microsoft Internet Explorer 7 and 8 on Windows XP and Vista allows remote attackers to cause a denial of service (application hang) via a large document composed of unprintable characters, aka MSRC 9011jr.

Frequently asked questions

What is CVE-2009-1335?: Microsoft Internet Explorer 7 and 8 on Windows XP and Vista allows remote attackers to cause a denial of service (application hang) via a large document composed of unprintable characters, aka MSRC 9011jr.
How severe is CVE-2009-1335?: CVE-2009-1335 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2009-1335 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-1335?: CVE-2009-1335 primarily affects Microsoft Internet Explorer. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-1335?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-1335 published?: CVE-2009-1335 was published on 2009-04-17 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:microsoft:internet_explorer:7:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:8:*:*:*:*:*:*:*

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