---
title: "CVE-2006-2369: RealVNC 4.1.1, and other products that use… | CubePath"
description: "RealVNC 4.1.1, and other products that use RealVNC such as AdderLink IP and Cisco CallManager, allows remote attackers to bypass authentication…"
language: en
source: https://cubepath.com/security/cve/CVE-2006-2369
---

# CVE-2006-2369: RealVNC 4.1.1, and other products that use… | CubePath

## Description

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.

Official description from the CVE record, published by redhat. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2006-2369)

## Key data

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.92355 (92.4% probability)

Percentile

99.8%

Scores of

Nov 10, 2026

Model

v2026.06.15

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [8355](http://securityreason.com/securityalert/8355)  (securityreason.com) third-party-advisory
- [ADV-2006-2492](http://www.vupen.com/english/advisories/2006/2492)  (vupen.com) vdb-entry
- [20107](http://secunia.com/advisories/20107)  (secunia.com) third-party-advisory
- [20060623 Linux VNC evil client patch - BID 17978](http://www.securityfocus.com/archive/1/438175/100/0/threaded)  (securityfocus.com) mailing-list
- [20060516 re: RealVNC 4.1.1 Remote Compromise](http://www.securityfocus.com/archive/1/434117/100/0/threaded)  (securityfocus.com) mailing-list
- [20060515 Re: \[Full-disclosure\] RealVNC 4.1.1 Remote Compromise](http://www.securityfocus.com/archive/1/434015/100/0/threaded)  (securityfocus.com) mailing-list
- [20060515 RealVNC 4.1.1 Remote Compromise](http://marc.info/?l=full-disclosure&m=114768344111131&w=2)  (marc.info) mailing-list
- [realvnc.com/products/free/4.1/release-notes.html](http://www.realvnc.com/products/free/4.1/release-notes.html)
- [VU#117929](http://www.kb.cert.org/vuls/id/117929)  (kb.cert.org) third-party-advisory
- [20060624 Re: Linux VNC evil client patch - BID 17978](http://www.securityfocus.com/archive/1/438368/100/0/threaded)  (securityfocus.com) mailing-list
- [20060520 Re: \[Full-disclosure\] RealVNC 4.1.1 Remote Compromise](http://www.securityfocus.com/archive/1/434560/100/0/threaded)  (securityfocus.com) mailing-list
- [intelliadmin.com/blog/2006/05/security-flaw-in-realvnc-411.…](http://www.intelliadmin.com/blog/2006/05/security-flaw-in-realvnc-411.html)
- [1016083](http://securitytracker.com/id?1016083)  (securitytracker.com) vdb-entry
- [ADV-2006-1821](http://www.vupen.com/english/advisories/2006/1821)  (vupen.com) vdb-entry
- [intelliadmin.com/blog/2006/05/vnc-flaw-proof-of-concept.html](http://www.intelliadmin.com/blog/2006/05/vnc-flaw-proof-of-concept.html)
- [realvnc-auth-bypass(26445)](https://exchange.xforce.ibmcloud.com/vulnerabilities/26445)  (exchange.xforce.ibmcloud.com) vdb-entry
- [20060515 RealVNC 4.1.1 Remote Compromise](http://www.securityfocus.com/archive/1/433994/100/0/threaded)  (securityfocus.com) mailing-list
- [17978](http://www.securityfocus.com/bid/17978)  (securityfocus.com) vdb-entry
- [25479](http://www.osvdb.org/25479)  (osvdb.org) vdb-entry
- [20109](http://secunia.com/advisories/20109)  (secunia.com) third-party-advisory
- [20060622 RealVNC Remote Authentication Bypass Vulnerability](http://www.cisco.com/warp/public/707/cisco-sr-20060622-cmm.shtml)  (cisco.com) vendor-advisory
- [\[vnc-list\] 20060513 Version 4.1.2](http://marc.info/?l=vnc-list&m=114755444130188&w=2)  (marc.info) mailing-list
- [ADV-2006-1790](http://www.vupen.com/english/advisories/2006/1790)  (vupen.com) vdb-entry
- [20060518 RE: \[Full-disclosure\] RealVNC 4.1.1 Remote Compromise](http://www.securityfocus.com/archive/1/434518/100/0/threaded)  (securityfocus.com) mailing-list
- [20789](http://secunia.com/advisories/20789)  (secunia.com) third-party-advisory
- [20220513 some details regarding CVE-2022-24422 / iDRAC VNC authentication](http://seclists.org/fulldisclosure/2022/May/29)  (seclists.org) mailing-list
- [openwall.com/lists/oss-security/2024/08/02/8](http://www.openwall.com/lists/oss-security/2024/08/02/8)

## Timeline

1. ID reserved May 15, 2006
2. Record published May 15, 2006
3. Record last updated Aug 7, 2024

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## About CubePath

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:00 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)