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…
- 7.5HighCVSS base score
- 92.4%Exploitation in 30 daysEPSS · top 0.2% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 6Public exploitsMetasploit, Nuclei and Exploit-DB
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list 2 Metasploit modules and 4 Exploit-DB entries for it.
Show the exploits6
Metasploit modules2 modules
- RealVNC NULL Authentication Mode Bypass (Metasploit module) (opens in a new tab)
auxiliary/admin/vnc/realvnc_41_bypassRank normaldisclosed 15 May 2006
- VNC Authentication None Detection (Metasploit module) (opens in a new tab)
auxiliary/scanner/vnc/vnc_none_authRank normal
Exploit-DB4 entries
- RealVNC 4.1.0/4.1.1 - Authentication Bypass (Exploit-DB entry) (opens in a new tab)
EDB-ID 36932remote, windowspublished 13 May 2012Verified
- RealVNC - Authentication Bypass (Metasploit) (Exploit-DB entry) (opens in a new tab)
EDB-ID 17719remote, windowspublished 26 Aug 2011Verified
- RealVNC 4.1.0 < 4.1.1 - VNC Null Authentication Bypass (Exploit-DB entry) (opens in a new tab)
EDB-ID 1791remote, multiplepublished 16 May 2006Verified
- RealVNC 4.1.0 < 4.1.1 - VNC Null Authentication Bypass (Metasploit) (Exploit-DB entry) (opens in a new tab)
EDB-ID 1794remote, multiplepublished 15 May 2006Verified
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By redhat
Published
- 18 years later
· 18 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 92.4% · top 0.2% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
n/a
- affected n/a
References
References27
- 8355 (opens in a new tab)third-party-advisoryx_refsource_SREASONx_transferred
- ADV-2006-2492 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 20107 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 20060623 Linux VNC evil client patch - BID 17978 (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20060516 re: RealVNC 4.1.1 Remote Compromise (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20060515 Re: [Full-disclosure] RealVNC 4.1.1 Remote Compromise (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20060515 RealVNC 4.1.1 Remote Compromise (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- http://www.realvnc.com/products/free/4.1/release-notes.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- VU#117929 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
- 20060624 Re: Linux VNC evil client patch - BID 17978 (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20060520 Re: [Full-disclosure] RealVNC 4.1.1 Remote Compromise (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- http://www.intelliadmin.com/blog/2006/05/security-flaw-in-realvnc-411.html (opens in a new tab)x_refsource_MISCx_transferred
- 1016083 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- ADV-2006-1821 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- http://www.intelliadmin.com/blog/2006/05/vnc-flaw-proof-of-concept.html (opens in a new tab)x_refsource_MISCx_transferred
- realvnc-auth-bypass(26445) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 20060515 RealVNC 4.1.1 Remote Compromise (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 17978 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 25479 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- 20109 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 20060622 RealVNC Remote Authentication Bypass Vulnerability (opens in a new tab)vendor-advisoryx_refsource_CISCOx_transferred
- [vnc-list] 20060513 Version 4.1.2 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- ADV-2006-1790 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 20060518 RE: [Full-disclosure] RealVNC 4.1.1 Remote Compromise (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20789 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 20220513 some details regarding CVE-2022-24422 / iDRAC VNC authentication (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- http://www.openwall.com/lists/oss-security/2024/08/02/8 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2006-2370 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2006-2369)Record last updated .