CVE-2009-0943: n/a vulnerability

CVE-2009-0943: Help Viewer in Apple Mac OS X 10.4.11 and 10.5 before 10.5.7 does not verify that HTML pathnames are locate...

Help Viewer in Apple Mac OS X 10.4.11 and 10.5 before 10.5.7 does not verify that HTML pathnames are located in a registered help book, which allows remote attackers to execute arbitrary code via a help: URL that triggers invocation of AppleScript files.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 04:57 UTC (UTC+00:00)

Security readout for executives and security teams

This flaw affects Apple Mac OS X Help Viewer on legacy 10.4.11 and 10.5 systems before 10.5.7. A malicious help URL could make Help Viewer run AppleScript files, leading to arbitrary code execution. The bundle does not show active exploitation or a CVSS score, but code execution from remote content is business-significant on any remaining legacy Macs. Exposure is likely limited to organizations still operating legacy Mac OS X 10.4.11 or 10.5 systems below 10.5.7, especially where users browse the web or open external links. Modern macOS versions are not identified as affected in the supplied sources. Prioritize remediation if any legacy affected Macs remain in business use. The vulnerability is old, but arbitrary code execution through user-facing link handling creates unacceptable risk on unsupported systems. Mitigation focus: Apply Apple’s relevant security update or upgrade beyond Mac OS X 10.5.7 where supported.; Retire or isolate Mac OS X 10.4.11 and vulnerable 10.5 systems.; Restrict web and email link handling on systems that cannot be updated..

Prepared: Jun 28, 2026, 10:45 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 13, 2009, 15:14 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

2Source links

CVSS and timeline data

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Source materials

CVE List V5 sourceCVE List V5
macos-helpviewer-html-code-execution(50486)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

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n/an/an/aListed

Weakness

CWE details

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