How severe is CVE-2007-3303?

CVE-2007-3303 has a CVSS 2.0 base score of 4.9, rated medium severity.

Is CVE-2007-3303 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-3303?

CVE-2007-3303 primarily affects Apache Http Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-3303?

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

When was CVE-2007-3303 published?

CVE-2007-3303 was published on 2007-06-20 and last updated on 2026-06-16.

CVE-2007-3303

CVE-2007-3303 is a medium-severity vulnerability in Apache Http Server with a CVSS 2.0 base score of 4.9. 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-94.

Key facts

Severity: Medium (CVSS 2.0 base score 4.9)
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Apache Http Server
Published: 2007-06-20
Last modified: 2026-06-16

Description

Apache httpd 2.0.59 and 2.2.4, with the Prefork MPM module, allows local users to cause a denial of service via certain code sequences executed in a worker process that (1) stop request processing by killing all worker processes and preventing creation of replacements or (2) hang the system by forcing the master process to fork an arbitrarily large number of worker processes. NOTE: This might be an inherent design limitation of Apache with respect to worker processes in hosted environments.

Frequently asked questions

What is CVE-2007-3303?: Apache httpd 2.0.59 and 2.2.4, with the Prefork MPM module, allows local users to cause a denial of service via certain code sequences executed in a worker process that (1) stop request processing by killing all worker processes and preventing creation of replacements or (2) hang the system by forcing the master process to fork an arbitrarily large number of worker processes. NOTE: This might be an inherent design limitation of Apache with respect to worker processes in hosted environments.
How severe is CVE-2007-3303?: CVE-2007-3303 has a CVSS 2.0 base score of 4.9, rated medium severity.
Is CVE-2007-3303 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-3303?: CVE-2007-3303 primarily affects Apache Http Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-3303?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2007-3303 published?: CVE-2007-3303 was published on 2007-06-20 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:apache:http_server:2.0.59:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2.4:*:*:*:*:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

222.99.52.202 (ipv4-addr)