CVE-2006-1652

Exp

Multiple buffer overflows in (a) UltraVNC (aka Ultr@VNC) 1.0.1 and earlier and (b) tabbed_viewer 1.29 (1) allow user-assisted remote attackers to execute arbitrary code via a malicious server that sends a long string to a client that connects on TCP port 5900, which triggers an overflow in Log::ReallyPrint; and (2) allow remote attackers to cause a denial of service (server crash) via a long HTTP GET request to TCP port 5800, which triggers an overflow in VNCLog::ReallyPrint.

Published: 2006-04-06 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-1652 is rated High Exploit Risk (86.3/100): CVSS Critical severity, with high exploitation likelihood (EPSS 85.94%, 99th percentile). 4 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2006-1652

EDB-ID Source Kind Published Link
16490 exploit_db edb 2010-04-30 Exploit-DB ↗
27569 exploit_db edb 2006-04-04 Exploit-DB ↗
27568 exploit_db edb 2006-04-04 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2006-1652

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-19 85.37% 85.94% +0.57%
2 2025-03-17 94.37% 85.37% -9.00%
3 2025-03-13 — 94.37% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-1652

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.0 2.0 HIGH
AV:N/AC:L/Au:S/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.0 10.0 [email protected]

Weakness enumeration for CVE-2006-1652

NVD evaluator notes for CVE-2006-1652

Solution: There are two seperate vulnerabilities here; One allows escalated priveleges to authenticated users, the other allows remote unauthenticated users to cause a Denial of Service (DoS).

Affected software / configurations for CVE-2006-1652

Vendor Product Version Raw CPE
ultravnc tabbed_viewer 1.29 cpe:2.3:a:ultravnc:tabbed_viewer:1.29:*:*:*:*:*:*:*
ultravnc vnc_viewer 1.0.1 cpe:2.3:a:ultravnc:vnc_viewer:1.0.1:*:*:*:*:*:*:*

References for CVE-2006-1652

cvelogic Threat Intelligence