CVE-2006-3747

NONECVSS 0.09.0▲
EchelonGraph scoreLOW confidence

Score elevated to 9.0 because EPSS predicts 90% probability of exploitation within the next 30 days (top 0.4% of all CVEs). Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss
Weaponized
0.0
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • 6 internet-exposed hosts are running an affected version right now
  • High exploitation likelihood — EPSS 96%
CISA-KEV: Not listedEPSS: 96%CVSS: —Exploit: NoneExposed: 6

A fix is available — apply it.

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.

Live · internet exposure

6 internet-exposed hosts are running an affected version of CVE-2006-3747 right now.

across 2 countries (United States, Japan)top: http_server
See the live KEV-Exposure radar →Found passively from public internet-scan data — aggregate, host-redacted.

EchelonGraph is the only CVE feed that fuses live vulnerability intelligence with its own live internet-exposure radar — so you see not just that a CVE is exploited, but how much of the internet is exposed to it right now.

CVSS v3
—
EG Score
9.0(low)
EPSS
99.9%
KEV
Not listed

Published

July 28, 2006

Last Modified

April 16, 2026

References (180)

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuapache2-mpm-threadpool (2.0.53-5ubuntu5.6) @ hoary2026-05-31ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 2× in last 7d / 10× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-09 19:03 UTCEPSS rescore
  2. 2026-07-08 20:39 UTCOSV refresh
  3. 2026-07-02 14:00 UTCEPSS rescore
  4. 2026-06-25 13:46 UTCEPSS rescore
  5. 2026-06-24 14:01 UTCEPSS rescore
  6. 2026-06-24 14:01 UTCEPSS rescore
  7. 2026-06-23 21:29 UTCEPSS rescore
  8. 2026-06-23 21:29 UTCEPSS rescore
  9. 2026-06-20 08:12 UTCOSV refresh
  10. 2026-06-15 17:44 UTCEPSS rescore
  11. 2026-06-13 22:56 UTCEPSS rescore
  12. 2026-06-10 22:14 UTCEPSS rescore
  13. 2026-06-10 13:17 UTCEPSS rescore
  14. 2026-06-07 15:21 UTCEPSS rescore
  15. 2026-06-05 22:43 UTCEPSS rescore
  16. 2026-06-05 06:07 UTCEPSS rescore
  17. 2026-06-05 06:07 UTCEPSS rescore
  18. 2026-06-04 13:09 UTCEPSS rescore
  19. 2026-06-04 13:09 UTCEPSS rescore
  20. 2026-06-02 20:10 UTCEPSS rescore
  21. 2026-06-02 20:10 UTCEPSS rescore
  22. 2026-05-31 07:27 UTCEG score recompute
  23. 2026-05-31 07:27 UTCVendor advisory
  24. 2026-05-31 07:27 UTCGHSA enrichment
  25. 2026-05-29 13:40 UTCEPSS rescore
Show 6 more
  1. 2026-05-27 13:37 UTCEPSS rescore
  2. 2026-05-27 13:37 UTCEPSS rescore
  3. 2026-05-24 16:42 UTCOSV refresh
  4. 2026-05-20 11:20 UTCEPSS rescore
  5. 2026-05-20 11:20 UTCEPSS rescore
  6. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(6 references)

Working exploit code is in the public domain (1 Metasploit module) (1 GitHub PoC) (4 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCdefensahacker/CVE-2006-3747
    First seen Nov 26, 2016

    Information about my advisory on CVE-2006-3747 (Apache mod_rewrite LDAP off-by-one buffer overflow).. At the time, it was the first public working exploit :)

    Open source ↗
  • Exploit-DBEDB-16752✓ verified
    First seen Feb 15, 2010

    Apache mod_rewrite - LDAP protocol Buffer Overflow (Metasploit)

    Open source ↗
  • Exploit-DBEDB-3996✓ verified
    First seen May 26, 2007

    Apache 2.0.58 mod_rewrite (Windows 2003) - Remote Overflow

    Open source ↗
  • Exploit-DBEDB-3680✓ verified
    First seen Apr 7, 2007

    Apache mod_rewrite (Windows x86) - Off-by-One Remote Overflow

    Open source ↗
  • Exploit-DBEDB-2237✓ verified
    First seen Aug 21, 2006

    Apache < 1.3.37/2.0.59/2.2.3 mod_rewrite - Remote Overflow

    Open source ↗
  • Metasploitexploit/windows/http/apache_mod_rewrite_ldap✓ verified
    First seen Jul 28, 2006

    Apache Module mod_rewrite LDAP Protocol Buffer Overflow

    Open source ↗

Frequently asked(4)

What is CVE-2006-3747?
CVE-2006-3747 is a none vulnerability published on July 28, 2006. 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…
When was CVE-2006-3747 disclosed?
CVE-2006-3747 was first published in the National Vulnerability Database on July 28, 2006, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2006-3747 actively exploited?
CVE-2006-3747 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2006-3747?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2006-3747, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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