RealVNC 4.1.1, and other products that use RealVNC such as AdderLink IP and Cisco CallManager, allows remote attackers to bypass…

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.

Scores

EPSS (exploitation in 30 days)

92.4% · top 0.2% of all CVEs (5 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

• n/a
• CWE-287 (opens in a new tab)All about CWE-287 and its CVEs

Affected products

• n/a

  • affected n/a

References (27)

• 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)
• 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

[![CVE-2006-2369](https://trackcve.app/badge/CVE-2006-2369.svg)](https://trackcve.app/cve/CVE-2006-2369)

Record last updated 7 Aug 2024, 17:51 UTC.