How severe is CVE-2007-2291?

CVE-2007-2291 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2007-2291 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 20% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-2291?

CVE-2007-2291 affects Microsoft Internet Explorer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-2291?

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-2007-2291 published?

CVE-2007-2291 was published on 2007-04-26 and last updated on 2026-06-16.

CVE-2007-2291

CVE-2007-2291 is a high-severity vulnerability in Microsoft Internet Explorer with a CVSS 2.0 base score of 7.5. Its EPSS exploit-prediction score of 20% places it in the 97th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 20% (97th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Internet Explorer
Published: 2007-04-26
Last modified: 2026-06-16

Description

CRLF injection vulnerability in the Digest Authentication support for Microsoft Internet Explorer 7.0.5730.11 allows remote attackers to conduct HTTP response splitting attacks via a LF (%0a) in the username attribute.

Frequently asked questions

What is CVE-2007-2291?: CRLF injection vulnerability in the Digest Authentication support for Microsoft Internet Explorer 7.0.5730.11 allows remote attackers to conduct HTTP response splitting attacks via a LF (%0a) in the username attribute.
How severe is CVE-2007-2291?: CVE-2007-2291 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2007-2291 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 20% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-2291?: CVE-2007-2291 affects Microsoft Internet Explorer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-2291?: 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-2007-2291 published?: CVE-2007-2291 was published on 2007-04-26 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:microsoft:internet_explorer:7.0.5730.11:*:*:*:*:*:*:*

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