How severe is CVE-2007-0086?

CVE-2007-0086 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2007-0086 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-0086?

CVE-2007-0086 affects Apache Http Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-0086?

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-2007-0086 published?

CVE-2007-0086 was published on 2007-01-05 and last updated on 2026-06-16.

CVE-2007-0086

CVE-2007-0086 is a high-severity vulnerability in Apache Http Server with a CVSS 2.0 base score of 7.8. 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-400.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 10% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Apache Http Server
Published: 2007-01-05
Last modified: 2026-06-16

Description

The Apache HTTP Server, when accessed through a TCP connection with a large window size, allows remote attackers to cause a denial of service (network bandwidth consumption) via a Range header that specifies multiple copies of the same fragment. NOTE: the severity of this issue has been disputed by third parties, who state that the large window size required by the attack is not normally supported or configured by the server, or that a DDoS-style attack would accomplish the same goal

Frequently asked questions

What is CVE-2007-0086?: The Apache HTTP Server, when accessed through a TCP connection with a large window size, allows remote attackers to cause a denial of service (network bandwidth consumption) via a Range header that specifies multiple copies of the same fragment. NOTE: the severity of this issue has been disputed by third parties, who state that the large window size required by the attack is not normally supported or configured by the server, or that a DDoS-style attack would accomplish the same goal
How severe is CVE-2007-0086?: CVE-2007-0086 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2007-0086 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-0086?: CVE-2007-0086 affects Apache Http Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-0086?: 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-2007-0086 published?: CVE-2007-0086 was published on 2007-01-05 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:apache:http_server:-:*:*:*:*:*:*:*

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