How severe is CVE-2006-3747?

CVE-2006-3747 has a CVSS 2.0 base score of 7.6, rated high severity.

Is CVE-2006-3747 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 96% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-3747?

CVE-2006-3747 primarily affects Apache Http Server. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-3747?

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-2006-3747 published?

CVE-2006-3747 was published on 2006-07-28 and last updated on 2026-06-16.

CVE-2006-3747

CVE-2006-3747 is a high-severity vulnerability in Apache Http Server with a CVSS 2.0 base score of 7.6. Its EPSS exploit-prediction score of 96% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-189.

Key facts

Severity: High (CVSS 2.0 base score 7.6)
EPSS exploit prediction: 96% (100th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-189
Affected product: Apache Http Server
Published: 2006-07-28
Last modified: 2026-06-16

Description

Off-by-one error in the ldap scheme handling in the Rewrite module (mod_rewrite) in Apache 1.3 from 1.3.28, 2.0.46 and other versions before 2.0.59, and 2.2, when RewriteEngine is enabled, allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via crafted URLs that are not properly handled using certain rewrite rules.

Frequently asked questions

What is CVE-2006-3747?: Off-by-one error in the ldap scheme handling in the Rewrite module (mod_rewrite) in Apache 1.3 from 1.3.28, 2.0.46 and other versions before 2.0.59, and 2.2, when RewriteEngine is enabled, allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via crafted URLs that are not properly handled using certain rewrite rules.
How severe is CVE-2006-3747?: CVE-2006-3747 has a CVSS 2.0 base score of 7.6, rated high severity.
Is CVE-2006-3747 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 96% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-3747?: CVE-2006-3747 primarily affects Apache Http Server. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-3747?: 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-2006-3747 published?: CVE-2006-3747 was published on 2006-07-28 and last updated on 2026-06-16.

References

Affected products (5)

cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:5.04:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:5.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:3.1:*:*:*:*:*:*:*

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Other CWE-189 (Numeric Errors) vulnerabilities

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CVE-2015-3864 — Critical (CVSS 10.0): Integer underflow in the MPEG4Extractor::parseChunk function in MPEG4Extractor.cpp in libstagefright in mediaserver in…
CVE-2015-3836 — Critical (CVSS 10.0): The Parse_wave function in arm-wt-22k/lib_src/eas_mdls.c in the Sonivox DLS-to-EAS converter in Android before 5.1.1…
CVE-2015-3834 — Critical (CVSS 10.0): Multiple integer overflows in the BnHDCP::onTransact function in media/libmedia/IHDCP.cpp in libstagefright in Android…

Browse all CWE-189 (Numeric Errors) vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

90.160.135.217 (ipv4-addr)
62.36.19.42 (ipv4-addr)
62.36.19.41 (ipv4-addr)
171.100.156.38 (ipv4-addr)