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CVE-2006-20001

HighPublished

Apache HTTP Server: mod_dav out of bounds read, or write of zero byte

Published: Jan 17, 2023
Updated: Feb 13, 2025
Assigning CNA: apache
Evidence observed: Aug 4, 2026

Primary CVSS

7.5/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS probability estimate

3.5%

Low · next 30 days

Percentile: 88.8%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

A carefully crafted If: request header can cause a memory read, or write of a single zero byte, in a pool (heap) memory location beyond the header value sent. This could cause the process to crash. This issue affects Apache HTTP Server 2.4.54 and earlier.

Sources

CVE-2006-20001PoC
A carefully crafted If: request header can cause a memory read, or write of a single zero byte, in a pool (heap) memory location beyond the header value sent. This could cause the process to crash. This issue affects Apache HTTP Server 2.4.54 and earlier. CVE project by @Sn0wAlice

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