How severe is CVE-2007-6422?

CVE-2007-6422 has a CVSS 2.0 base score of 4.0, rated medium severity.

Is CVE-2007-6422 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-2007-6422?

CVE-2007-6422 primarily affects Apache Http Server. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-6422?

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

When was CVE-2007-6422 published?

CVE-2007-6422 was published on 2008-01-08 and last updated on 2026-06-16.

CVE-2007-6422

CVE-2007-6422 is a medium-severity vulnerability in Apache Http Server with a CVSS 2.0 base score of 4.0. 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 4.0)
EPSS exploit prediction: 10% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Apache Http Server
Published: 2008-01-08
Last modified: 2026-06-16

Description

The balancer_handler function in mod_proxy_balancer in the Apache HTTP Server 2.2.0 through 2.2.6, when a threaded Multi-Processing Module is used, allows remote authenticated users to cause a denial of service (child process crash) via an invalid bb variable.

Frequently asked questions

What is CVE-2007-6422?: The balancer_handler function in mod_proxy_balancer in the Apache HTTP Server 2.2.0 through 2.2.6, when a threaded Multi-Processing Module is used, allows remote authenticated users to cause a denial of service (child process crash) via an invalid bb variable.
How severe is CVE-2007-6422?: CVE-2007-6422 has a CVSS 2.0 base score of 4.0, rated medium severity.
Is CVE-2007-6422 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-2007-6422?: CVE-2007-6422 primarily affects Apache Http Server. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-6422?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2007-6422 published?: CVE-2007-6422 was published on 2008-01-08 and last updated on 2026-06-16.

References

Affected products (7)

cpe:2.3:a:apache:http_server:-:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2.3:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2.4:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2.6:*:*:*:*:*:*:*

More vulnerabilities in Apache Http Server

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CVE-1999-1293 — Critical (CVSS 10.0): mod_proxy in Apache 1.2.5 and earlier allows remote attackers to cause a denial of service via malformed FTP commands,…
CVE-1999-0926 — Critical (CVSS 10.0): Apache allows remote attackers to conduct a denial of service via a large number of MIME headers.

All CVEs affecting Apache Http Server →

Other CWE-399 (Resource Management Errors) vulnerabilities

CVE-2015-8104 — Critical (CVSS 10.0): The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a…
CVE-2015-0339 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
CVE-2014-0560 — Critical (CVSS 10.0): Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.12 and 11.x before 11.0.09 on Windows and OS…

Browse all CWE-399 (Resource Management Errors) vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

222.99.52.202 (ipv4-addr)
41.224.62.206 (ipv4-addr)
218.4.156.254 (ipv4-addr)
171.100.156.38 (ipv4-addr)