How severe is CVE-2007-5896?

CVE-2007-5896 has a CVSS 2.0 base score of 7.1, rated high severity.

Is CVE-2007-5896 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-5896?

CVE-2007-5896 affects Mozilla Firefox. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-5896?

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

When was CVE-2007-5896 published?

CVE-2007-5896 was published on 2007-11-08 and last updated on 2026-06-16.

CVE-2007-5896

CVE-2007-5896 is a high-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 7.1. 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: High (CVSS 2.0 base score 7.1)
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Mozilla Firefox
Published: 2007-11-08
Last modified: 2026-06-16

Description

Mozilla Firefox 2.0.0.9 allows remote attackers to cause a denial of service (CPU consumption and crash) via an iframe with Javascript that sets the document.location to contain a leading NULL byte (\x00) and a (1) res://, (2) about:config, or (3) file:/// URI.

Frequently asked questions

What is CVE-2007-5896?: Mozilla Firefox 2.0.0.9 allows remote attackers to cause a denial of service (CPU consumption and crash) via an iframe with Javascript that sets the document.location to contain a leading NULL byte (\x00) and a (1) res://, (2) about:config, or (3) file:/// URI.
How severe is CVE-2007-5896?: CVE-2007-5896 has a CVSS 2.0 base score of 7.1, rated high severity.
Is CVE-2007-5896 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-5896?: CVE-2007-5896 affects Mozilla Firefox. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-5896?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2007-5896 published?: CVE-2007-5896 was published on 2007-11-08 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:mozilla:firefox:2.0.0.9:*:*:*:*:*:*:*

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