$ cve CVE-2006-2369 JSON

CVE-2006-2369 EXPLOIT

7.5

HIGH · CVSS 2.0 · EPSS 92.4% (pctl 100)

Patch early

A public exploit exists.

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.

Scoring

CVSS	7.5 (HIGH, v2.0)
Vector	AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS	92.36% — more likely to be exploited than 100% of all CVEs
Weakness	CWE-287
On CISA KEV	no
Public exploit	yes
Published	2006-05-15
Last modified	2026-06-16

Affected (1)

Vendor	Product
vnc	realvnc

Public exploits

Source	Title	Date
exploit-db	RealVNC 4.1.0/4.1.1 - Authentication Bypass	2012-05-13
exploit-db	RealVNC - Authentication Bypass (Metasploit)	2011-08-26
exploit-db	RealVNC 4.1.0 < 4.1.1 - VNC Null Authentication Bypass	2006-05-16
exploit-db	RealVNC 4.1.0 < 4.1.1 - VNC Null Authentication Bypass (Metasploit)	2006-05-15

References

→ the Explorer · watch your stack · NVD