CVE-2008-4770: n/a vulnerability

CVE-2008-4770: The CMsgReader::readRect function in the VNC Viewer component in RealVNC VNC Free Edition 4.0 through 4.1.2...

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."

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 10:31 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2008-4770 affects the RealVNC Viewer client. A malicious or compromised VNC server could send crafted RFB protocol data that makes the viewer execute code on the user’s machine. The business risk is highest where staff connect from administrative workstations to untrusted, legacy, or third-party VNC servers. Exposure is likely limited to systems running the specified legacy RealVNC Viewer versions, especially administrator endpoints or jump boxes that initiate VNC sessions to servers outside strict trust boundaries. Prioritize remediation where legacy RealVNC Viewer exists on privileged workstations. The bug is old, but arbitrary code execution through an administrative tool can still create outsized impact if forgotten software remains installed. Mitigation focus: Upgrade affected RealVNC Viewer installations using vendor or distribution guidance.; Remove or replace legacy RealVNC Viewer 4.x deployments where upgrade is not practical.; Restrict VNC connections to trusted servers and managed administrative networks..

Prepared: Jun 28, 2026, 11:41 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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description · low confidence lookup

Execution behavior lookup

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cve · low confidence lookup

CVE-2008-4770 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jan 16, 2009, 21:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
FEDORA-2009-1001CVE reference · vendor-advisory, x_refsource_FEDORA
realvnc-cmsgreader-code-execution(45969)CVE reference · vdb-entry, x_refsource_XF
realvnc-rfb-protocol-code-execution(47937)CVE reference · vdb-entry, x_refsource_XF
oval:org.mitre.oval:def:9367CVE reference · vdb-entry, signature

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.