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Fencer Vulns
high 7.5

CVE-2006-2369 in the critical feed json

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

published 2006-05-15 20 y ago modified 2026-06-16 4 mo ago also EUVD-2006-2370

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
92.4%
EPSS 92.4% chance of exploitation in 30 days, percentile 99.8%
public exploits
6
Metasploit, Exploit-DB

Summary

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.

Patch / fix

Timeline

  1. First public exploit (Metasploit auxiliary/admin/vnc/realvnc_41_bypass)
  2. Published

Exploit prediction

92.36% chance of exploitation in the next 30 days, higher than 99.8% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.