Vulnerability Report

CVE-2006-2369

Title: Vnc Realvnc Auth Bypass

Auth Bypass

Proof Of Concept

PoC Available for CVE-2006-2369

CWE Category CWE-287
Published Date May 15, 2006
Modified Date Jun 16, 2026
Exploit Status Available
Score 7.5 CVSS v2.0
Exploit Probability (EPSS)
92.36%

Vulnerability Summary

CVE-2006-2369: RealVNC 4.1.1, and other products that use RealVNC such as AdderLink IP and Cisco CallManager, allows remote attackers to bypass authentication via a request in which the client specifies an insecure security type such as "Type 1 - None", which is accepted even if it is not offered by the server, as originally demonstrated using a long password.

Impacted Vendors

V
vnc 1

Reference Links

http://marc.info/?l=full-disclosure&m=114768344111131&w=2 http://marc.info/?l=vnc-list&m=114755444130188&w=2 http://seclists.org/fulldisclosure/2022/May/29 http://secunia.com/advisories/20107 http://secunia.com/advisories/20109 http://secunia.com/advisories/20789 http://securityreason.com/securityalert/8355 http://securitytracker.com/id?1016083 http://www.cisco.com/warp/public/707/cisco-sr-20060622-cmm.shtml http://www.intelliadmin.com/blog/2006/05/security-flaw-in-realvnc-411.html http://www.intelliadmin.com/blog/2006/05/vnc-flaw-proof-of-concept.html http://www.kb.cert.org/vuls/id/117929 http://www.osvdb.org/25479 http://www.realvnc.com/products/free/4.1/release-notes.html http://www.securityfocus.com/archive/1/433994/100/0/threaded http://www.securityfocus.com/archive/1/434015/100/0/threaded http://www.securityfocus.com/archive/1/434117/100/0/threaded http://www.securityfocus.com/archive/1/434518/100/0/threaded http://www.securityfocus.com/archive/1/434560/100/0/threaded http://www.securityfocus.com/archive/1/438175/100/0/threaded http://www.securityfocus.com/archive/1/438368/100/0/threaded http://www.securityfocus.com/bid/17978 http://www.vupen.com/english/advisories/2006/1790 http://www.vupen.com/english/advisories/2006/1821 http://www.vupen.com/english/advisories/2006/2492 https://exchange.xforce.ibmcloud.com/vulnerabilities/26445 http://marc.info/?l=full-disclosure&m=114768344111131&w=2 http://marc.info/?l=vnc-list&m=114755444130188&w=2 http://seclists.org/fulldisclosure/2022/May/29 http://secunia.com/advisories/20107 http://secunia.com/advisories/20109 http://secunia.com/advisories/20789 http://securityreason.com/securityalert/8355 http://securitytracker.com/id?1016083 http://www.cisco.com/warp/public/707/cisco-sr-20060622-cmm.shtml http://www.intelliadmin.com/blog/2006/05/security-flaw-in-realvnc-411.html http://www.intelliadmin.com/blog/2006/05/vnc-flaw-proof-of-concept.html http://www.kb.cert.org/vuls/id/117929 http://www.openwall.com/lists/oss-security/2024/08/02/8 http://www.osvdb.org/25479 http://www.realvnc.com/products/free/4.1/release-notes.html http://www.securityfocus.com/archive/1/433994/100/0/threaded http://www.securityfocus.com/archive/1/434015/100/0/threaded http://www.securityfocus.com/archive/1/434117/100/0/threaded http://www.securityfocus.com/archive/1/434518/100/0/threaded http://www.securityfocus.com/archive/1/434560/100/0/threaded http://www.securityfocus.com/archive/1/438175/100/0/threaded http://www.securityfocus.com/archive/1/438368/100/0/threaded http://www.securityfocus.com/bid/17978 http://www.vupen.com/english/advisories/2006/1790 http://www.vupen.com/english/advisories/2006/1821 http://www.vupen.com/english/advisories/2006/2492 https://exchange.xforce.ibmcloud.com/vulnerabilities/26445
CVSS v2.0
Source Entity [email protected]
Severity HIGH
7.5
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:N/C:P/I:P/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2006-2369 Exploits & PoCs (Proof Of Concept)

Exploit-DB https://www.exploit-db.com/exploits/1791
View Code
Exploit-DB https://www.exploit-db.com/exploits/1794
View Code
Exploit-DB https://www.exploit-db.com/exploits/17719
View Code
Exploit-DB https://www.exploit-db.com/exploits/36932
View Code
MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector N/A
Complexity N/A
Privileges N/A
Interaction NONE
CVSS Vector String AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected Stack

No specific products linked.