CVE-2011-1775: n/a vulnerability

CVE-2011-1775: The CSecurityTLS::processMsg function in common/rfb/CSecurityTLS.cxx in the vncviewer component in TigerVNC...

The CSecurityTLS::processMsg function in common/rfb/CSecurityTLS.cxx in the vncviewer component in TigerVNC 1.1beta1 does not properly verify the server's X.509 certificate, which allows man-in-the-middle attackers to spoof a TLS VNC server via an arbitrary certificate.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 22:37 UTC (UTC+00:00)

Security readout for executives and security teams

TigerVNC's vncviewer in version 1.1beta1 failed to properly verify a TLS server certificate. A person positioned between a user and a VNC server could impersonate the server with any certificate, undermining trust in the remote desktop connection. Exposure is most likely where TigerVNC vncviewer 1.1beta1, or affected downstream packages referenced by Fedora or Red Hat advisories, was used for TLS-protected VNC connections. Treat as a targeted remote-access trust issue, not a broad internet worm risk. Prioritize environments where VNC was used over shared, hostile, or externally routed networks. Mitigation focus: Identify and retire TigerVNC vncviewer 1.1beta1 where present.; Apply vendor updates from Fedora, Red Hat, or the relevant package maintainer.; Check vendor advisories for exact fixed package versions before closing remediation..

Prepared: Jun 28, 2026, 01:17 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

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: May 26, 2011, 18:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

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Source materials

CVE List V5 sourceCVE List V5
https://bugzilla.redhat.com/show_bug.cgi?id=702672CVE reference · x_refsource_CONFIRM
https://bugzilla.redhat.com/show_bug.cgi?id=702470CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

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