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Vulnerability record · CVE-2006-6981 · published 8 February 2007

CVE-2006-6981: 3proxy vulnerability

3proxy · 3proxy

3proxy 0.5 to 0.5.2, when NT-encoded passwords are being used, allows remote attackers to cause a denial of service (blocked account) via unspecified vectors related to NTLM authentication, which causes a password hash to be overwritten.

5.0 CVSS 2.0 Medium EPSS 1.3% · top 31.5%
5.0CVSS 2.0 base score
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
16 Jun 2026Last modified by NVD

Description

3proxy 0.5 to 0.5.2, when NT-encoded passwords are being used, allows remote attackers to cause a denial of service (blocked account) via unspecified vectors related to NTLM authentication, which causes a password hash to be overwritten.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://3proxy.ru/0.5.3g/Changelog.txt Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/38201
http://3proxy.ru/0.5.3g/Changelog.txt Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/38201

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2007-20313proxy vulnerabilityBuffer overflow in the HTTP proxy service for 3proxy 0.5 to 0.5.3g, and 0.6b-devel before 20070413, might allow remote attackers to execute arbitrary…EPSS 15%9.8CVE-2019-144953proxy out-of-bounds write vulnerabilitywebadmin.c in 3proxy before 0.8.13 has an out-of-bounds write in the admin interface.EPSS 1.9%5.0CVE-2007-56223proxy vulnerabilityDouble free vulnerability in the ftpprchild function in ftppr in 3proxy 0.5 through 0.5.3i allows remote attackers to cause a denial of service (daem…EPSS 2.1%5.0CVE-2006-69823proxy vulnerability3proxy 0.5 to 0.5.2 does not offer NTLM authentication before basic authentication, which might cause browsers with incomplete RFC2616/RFC2617 suppor…EPSS 1.00%

Source: NIST National Vulnerability Database (record CVE-2006-6981), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.