How severe is CVE-2009-1711?

CVE-2009-1711 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2009-1711 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-1711?

CVE-2009-1711 primarily affects Apple Safari. In total, 34 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-1711?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2009-1711 published?

CVE-2009-1711 was published on 2009-06-10 and last updated on 2026-06-16.

CVE-2009-1711

CVE-2009-1711 is a critical-severity vulnerability in Apple Safari with a CVSS 2.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 7% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Apple Safari
Published: 2009-06-10
Last modified: 2026-06-16

Description

WebKit in Apple Safari before 4.0 does not properly initialize memory for Attr DOM objects, which allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted HTML document.

Frequently asked questions

What is CVE-2009-1711?: WebKit in Apple Safari before 4.0 does not properly initialize memory for Attr DOM objects, which allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted HTML document.
How severe is CVE-2009-1711?: CVE-2009-1711 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2009-1711 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-1711?: CVE-2009-1711 primarily affects Apple Safari. In total, 34 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-1711?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2009-1711 published?: CVE-2009-1711 was published on 2009-06-10 and last updated on 2026-06-16.

References

Affected products (34)

cpe:2.3:a:apple:safari:*:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:0.8:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:0.9:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:1.0:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:1.0.3:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:1.1:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:1.2:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:1.3:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:1.3.1:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:1.3.2:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:2.0:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:2.0.2:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:2.0.4:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:3.0:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:3.0.2:-:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:3.0.3:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:3.0.4:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:3.1:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:3.1.1:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:3.1.2:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:3.2.1:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:3.2.3:*:mac:*:*:*:*:*
cpe:2.3:a:apple:safari:*:*:windows:*:*:*:*:*
cpe:2.3:a:apple:safari:3.0:*:windows:*:*:*:*:*
cpe:2.3:a:apple:safari:3.0.1:*:windows:*:*:*:*:*
cpe:2.3:a:apple:safari:3.0.2:*:windows:*:*:*:*:*
cpe:2.3:a:apple:safari:3.0.3:*:windows:*:*:*:*:*
cpe:2.3:a:apple:safari:3.0.4:*:windows:*:*:*:*:*
cpe:2.3:a:apple:safari:3.1:*:windows:*:*:*:*:*
cpe:2.3:a:apple:safari:3.1.1:*:windows:*:*:*:*:*
cpe:2.3:a:apple:safari:3.1.2:*:windows:*:*:*:*:*
cpe:2.3:a:apple:safari:3.2:*:windows:*:*:*:*:*
cpe:2.3:a:apple:safari:3.2.1:*:windows:*:*:*:*:*
cpe:2.3:a:apple:safari:3.2.2:*:windows:*:*:*:*:*

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