CVE-2009-0388: n/a vulnerability

CVE-2009-0388: Multiple integer signedness errors in (1) UltraVNC 1.0.2 and 1.0.5 and (2) TightVnc 1.3.9 allow remote VNC...

Multiple integer signedness errors in (1) UltraVNC 1.0.2 and 1.0.5 and (2) TightVnc 1.3.9 allow remote VNC servers to cause a denial of service (heap corruption and application crash) or possibly execute arbitrary code via a large length value in a message, related to the (a) ClientConnection::CheckBufferSize and (b) ClientConnection::CheckFileZipBufferSize functions in ClientConnection.cpp.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 04:31 UTC (UTC+00:00)

Security readout for executives and security teams

Old UltraVNC and TightVNC clients can be crashed, and may be exposed to code execution, when they connect to a malicious VNC server that sends an oversized message length. The business risk is highest where legacy remote-support tools still exist or users connect to untrusted VNC servers. Exposure is likely limited to environments still running the named legacy VNC clients, especially systems that initiate VNC sessions to third-party, unmanaged, or compromised servers. Prioritize remediation if legacy VNC clients remain in use. The issue is old, but remote support software often persists unnoticed and can create workstation compromise or availability risk when users connect to malicious servers. Mitigation focus: Inventory endpoints for UltraVNC 1.0.2, UltraVNC 1.0.5, and TightVNC 1.3.9.; Upgrade or retire affected VNC clients using vendor guidance.; Restrict VNC client connections to trusted, managed servers only..

Prepared: Jun 28, 2026, 11:23 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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CVE-2009-0388 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Feb 4, 2009, 19:00 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

3Source 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
8024CVE reference · exploit, x_refsource_EXPLOIT-DB
7990CVE reference · exploit, x_refsource_EXPLOIT-DB

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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