HIGH
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
Published May 15, 2006
7.5
HIGHCVSS 2.0
EPSS 92.36%
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.
Affected products
Remediation
Red Hat statement
This issue only affected version 4.1.1 and not the versions distributed with Red Hat Enterprise Linux 2.1, 3, or 4.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
7.5 HIGH NVD
AV:N/AC:L/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
92.36% 0.92355
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.92355
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (21 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 92.36% (0.92355) | 99.82th | v5 (v2026.06.15) |
| Jun 15, 2026 | 91.52% (0.91522) | 99.80th | v5 (v2026.06.15) |
| Mar 21, 2026 | 92.50% (0.92499) | 99.73th | v4 (v2025.03.14) |
| Sep 16, 2025 | 91.14% (0.91145) | 99.63th | v4 (v2025.03.14) |
| Jun 9, 2025 | 92.70% (0.92699) | 99.74th | v4 (v2025.03.14) |
| May 14, 2025 | 90.21% (0.90206) | 99.56th | v4 (v2025.03.14) |
| Mar 17, 2025 | 92.85% (0.92854) | 99.76th | v4 (v2025.03.14) |
| Dec 12, 2024 | 97.14% (0.97143) | 99.85th | v3 (v2023.03.01) |
| Apr 4, 2024 | 97.20% (0.97198) | 99.81th | v3 (v2023.03.01) |
| Jan 19, 2024 | 97.17% (0.97175) | 99.77th | v3 (v2023.03.01) |
| Nov 25, 2023 | 97.11% (0.97113) | 99.73th | v3 (v2023.03.01) |
| Oct 8, 2023 | 97.08% (0.97078) | 99.68th | v3 (v2023.03.01) |
| Aug 19, 2023 | 97.12% (0.97123) | 99.68th | v3 (v2023.03.01) |
| Jul 11, 2023 | 97.05% (0.97045) | 99.63th | v3 (v2023.03.01) |
| Jul 8, 2023 | 96.91% (0.96909) | 99.56th | v3 (v2023.03.01) |
| Jun 3, 2023 | 96.89% (0.96894) | 99.54th | v3 (v2023.03.01) |
| May 8, 2023 | 97.12% (0.97120) | 99.63th | v3 (v2023.03.01) |
| Mar 19, 2023 | 97.13% (0.97130) | 99.61th | v3 (v2023.03.01) |
| Mar 7, 2023 | 97.17% (0.97168) | 99.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 78.89% (0.78891) | 99.47th | v2 (v2022.01.01) |
| Feb 4, 2022 | 78.89% (0.78891) | 99.37th | v2 (v2022.01.01) |
Weaknesses (1)
References (30)
- http://marc.info/?l=full-disclosure&m=114768344111131&w=2 mailing-listx_refsource_FULLDISC
- http://marc.info/?l=vnc-list&m=114755444130188&w=2 mailing-listx_refsource_MLIST
- http://seclists.org/fulldisclosure/2022/May/29 mailing-listx_refsource_FULLDISC
- http://secunia.com/advisories/20107 third-party-advisoryx_refsource_SECUNIAPatchVendor Advisory
- http://secunia.com/advisories/20109 third-party-advisoryx_refsource_SECUNIAPatchVendor Advisory
- http://secunia.com/advisories/20789 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://securityreason.com/securityalert/8355 third-party-advisoryx_refsource_SREASON
- http://securitytracker.com/id?1016083 vdb-entryx_refsource_SECTRACKExploitPatch
- http://www.cisco.com/warp/public/707/cisco-sr-20060622-cmm.shtml vendor-advisoryx_refsource_CISCO
- http://www.intelliadmin.com/blog/2006/05/security-flaw-in-realvnc-411.html x_refsource_MISC
- http://www.intelliadmin.com/blog/2006/05/vnc-flaw-proof-of-concept.html x_refsource_MISCExploitPatch
- http://www.kb.cert.org/vuls/id/117929 third-party-advisoryx_refsource_CERT-VNPatchThird Party AdvisoryUS Government Resource
- http://www.openwall.com/lists/oss-security/2024/08/02/8
- http://www.osvdb.org/25479 vdb-entryx_refsource_OSVDB
- http://www.realvnc.com/products/free/4.1/release-notes.html x_refsource_CONFIRMPatch
- http://www.securityfocus.com/archive/1/433994/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/archive/1/434015/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/archive/1/434117/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/archive/1/434518/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/archive/1/434560/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/archive/1/438175/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/archive/1/438368/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/bid/17978 vdb-entryx_refsource_BIDExploitPatch
- http://www.vupen.com/english/advisories/2006/1790 vdb-entryx_refsource_VUPENVendor Advisory
- http://www.vupen.com/english/advisories/2006/1821 vdb-entryx_refsource_VUPENVendor Advisory
- http://www.vupen.com/english/advisories/2006/2492 vdb-entryx_refsource_VUPENVendor Advisory
- https://access.redhat.com/security/cve/CVE-2006-2369 Vendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/26445 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2006-2369
- https://www.cve.org/CVERecord?id=CVE-2006-2369
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published May 15, 2006
Updated Aug 7, 2024
Reserved May 15, 2006
Link CVE-2006-2369
CISA Vulnrichment
Updated n/a