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CVE-2008-4770
The CMsgReader::readRect function in the VNC Viewer component in RealVNC VNC Free Edition 4.0 through 4.1.2, Enterprise Edition E4.0…
- 10.0HighCVSS base score
- 4.1%Exploitation in 30 daysEPSS · top 9.3% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The CMsgReader::readRect function in the VNC Viewer component in RealVNC VNC Free Edition 4.0 through 4.1.2, Enterprise Edition E4.0 through E4.4.2, and Personal Edition P4.0 through P4.4.2 allows remote VNC servers to execute arbitrary code via crafted RFB protocol data, related to "encoding type."
Timeline
ID reserved
By mitre
- 3 months later
· 3 months later
Published
- 16 years later
· 16 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 | High10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
- EPSS (exploitation in 30 days)
- 4.1% · top 9.3% of all CVEs (9 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 10.0.
Affected products
n/a
- affected n/a
References
17
- GLSA-200903-17 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- http://www.realvnc.com/products/upgrade.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- FEDORA-2009-1001 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- http://www.realvnc.com/products/free/4.1/release-notes.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- 33689 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 34184 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- http://sunsolve.sun.com/search/document.do?assetkey=1-21-140455-01-1 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 248526 (opens in a new tab)vendor-advisoryx_refsource_SUNALERTx_transferred
- 31832 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- realvnc-cmsgreader-code-execution(45969) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 33263 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 32317 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- ADV-2008-2868 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- [vnc-list] 20081126 VNC Viewer Vulnerability CVE-2008-4770 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- realvnc-rfb-protocol-code-execution(47937) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- oval:org.mitre.oval:def:9367 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- RHSA-2009:0261 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_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-2008-4750 (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-2008-4770)Record last updated .