CVE-1999-0975: n/a vulnerability

CVE-1999-0975: The Windows help system can allow a local user to execute commands as another user by editing a table of co...

The Windows help system can allow a local user to execute commands as another user by editing a table of contents metafile with a .CNT extension and modifying the topic action to include the commands to be executed when the .hlp file is accessed.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 1, 2024, 16:55 UTC (UTC+00:00)

Security readout for executives and security teams

A weakness in the legacy Windows help system lets someone already signed in to a Windows machine run commands as another user by tampering with a help-file table of contents. Because it requires local access and targets very old Windows help components, the practical business risk today is minimal outside of unpatched legacy systems still relying on classic .hlp/.cnt help files. Local, authenticated users on legacy Windows systems where classic WinHelp (.hlp/.cnt) content is still installed or used. Exposure requires the ability to modify a .CNT file that another user or a higher-privileged account will subsequently open. Not exposed over the network per the referenced sources. Low priority for modern environments. Treat as legacy hygiene: confirm classic Windows help files are not in use, and address as part of standard endpoint hardening rather than an emergency patch cycle. Mitigation focus: Retire or replace legacy WinHelp (.hlp/.cnt) content on any still-supported Windows hosts.; Restrict file-system permissions so standard users cannot modify shared .CNT or .hlp files.; Follow current Microsoft guidance for WinHelp, which is deprecated on modern Windows versions..

Prepared: Jul 12, 2026, 06:26 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: Jan 4, 2000, 05:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

0Timeline events

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1Source links

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Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

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