CVE-2006-1652
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…
- 9.0HighCVSS base score
- 68.0%Exploitation in 30 daysEPSS · top 0.7% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 4Public exploitsMetasploit, Nuclei and Exploit-DB
Description
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list a Metasploit module and 3 Exploit-DB entries for it. 2 references of the record are tagged as an exploit.
Show the exploits6
Metasploit modules1 module
- UltraVNC 1.0.1 Client Buffer Overflow (Metasploit module) (opens in a new tab)
exploit/windows/vnc/ultravnc_clientRank normaldisclosed 4 Apr 2006
Exploit-DB3 entries
- UltraVNC 1.0.1 - Client Buffer Overflow (Metasploit) (Exploit-DB entry) (opens in a new tab)
EDB-ID 16490remote, windowspublished 30 Apr 2010Verified
- UltraVNC 1.0.1 - Multiple Remote Error Logging Buffer Overflow Vulnerabilities (1) (Exploit-DB entry) (opens in a new tab)
EDB-ID 27568remote, windowspublished 4 Apr 2006Verified
- UltraVNC 1.0.1 - Multiple Remote Error Logging Buffer Overflow Vulnerabilities (2) (Exploit-DB entry) (opens in a new tab)
EDB-ID 27569remote, windowspublished 4 Apr 2006Verified
References tagged exploit2 references
- 1642 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- 1643 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
Published
- 18 years later
· 18 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High9.0 | AV:N/AC:L/Au:S/C:C/I:C/A:C |
- EPSS (exploitation in 30 days)
- 68.0% · top 0.7% of all CVEs (10 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 9.0.
Affected products
n/a
- affected n/a
References
12
- 1642 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- untr@vnc-error-bo(25648) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 1643 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- ultr@vnc-vnclogreallyprint-bo(25650) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 19513 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 20060411 Re: Buffer-overflow in Ultr@VNC 1.0.1 viewer POC (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20060405 Re: Buffer-overflow in Ultr@VNC 1.0.1 viewer and server (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- ADV-2006-1240 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 674 (opens in a new tab)third-party-advisoryx_refsource_SREASONx_transferred
- 20060404 Buffer-overflow in Ultr@VNC 1.0.1 viewer and server (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20060404 Buffer-overflow in Ultr@VNC 1.0.1 viewer and server (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- 17378 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
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)
- EUVD EUVD-2006-1653 (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
[](https://cveledger.app/cve/CVE-2006-1652)Record last updated .