How severe is CVE-2008-5821?

CVE-2008-5821 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2008-5821 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-5821?

CVE-2008-5821 affects Apple Safari. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2008-5821?

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

When was CVE-2008-5821 published?

CVE-2008-5821 was published on 2009-01-02 and last updated on 2026-06-16.

CVE-2008-5821

CVE-2008-5821 is a medium-severity vulnerability in Apple Safari with a CVSS 2.0 base score of 5.0. 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: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Apple Safari
Published: 2009-01-02
Last modified: 2026-06-16

Description

Memory leak in WebKit.dll in WebKit, as used by Apple Safari 3.2 on Windows Vista SP1, allows remote attackers to cause a denial of service (memory consumption and browser crash) via a long ALINK attribute in a BODY element in an HTML document.

Frequently asked questions

What is CVE-2008-5821?: Memory leak in WebKit.dll in WebKit, as used by Apple Safari 3.2 on Windows Vista SP1, allows remote attackers to cause a denial of service (memory consumption and browser crash) via a long ALINK attribute in a BODY element in an HTML document.
How severe is CVE-2008-5821?: CVE-2008-5821 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2008-5821 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-5821?: CVE-2008-5821 affects Apple Safari. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2008-5821?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-5821 published?: CVE-2008-5821 was published on 2009-01-02 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:apple:safari:3.2:*:*:*:*:*:*:*

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