CVE-2006-2369: n/a vulnerability

CVE-2006-2369: RealVNC 4.1.1, and other products that use RealVNC such as AdderLink IP and Cisco CallManager, allows remot...

RealVNC 4.1.1, and other products that use RealVNC such as AdderLink IP and Cisco CallManager, allows remote attackers to bypass authentication via a request in which the client specifies an insecure security type such as "Type 1 - None", which is accepted even if it is not offered by the server, as originally demonstrated using a long password.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 17:51 UTC (UTC+00:00)

Security readout for executives and security teams

This is an old but serious RealVNC authentication-bypass issue. A remote client could ask for an insecure no-authentication mode and the server could accept it, potentially giving access without the intended password. The bundle names RealVNC 4.1.1 and products using RealVNC, including AdderLink IP and Cisco CallManager. Exposure is most likely where RealVNC 4.1.1 or RealVNC-derived components are reachable on a network. Internet-facing remote-control services, management appliances, and named downstream products need review. The bundle does not prove broader affected versions beyond the listed products. Treat as a high-priority legacy exposure issue. It can bypass authentication on remote-control software, but evidence in the bundle is old and does not show current exploitation. The practical task is finding and isolating legacy VNC deployments. Mitigation focus: Identify RealVNC 4.1.1 and RealVNC-derived products in inventory.; Check RealVNC, CERT, and affected vendor guidance for fixed versions.; Remove VNC exposure from the internet wherever possible..

Prepared: Jun 29, 2026, 12:43 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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description · low confidence lookup

Credential and access behavior lookup

The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2006-2369 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: May 15, 2006, 16:00 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

2Source 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
realvnc-auth-bypass(26445)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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