CVE-2000-0457: n/a vulnerability

CVE-2000-0457: ISM.DLL in IIS 4.0 and 5.0 allows remote attackers to read file contents by requesting the file and appendi...

ISM.DLL in IIS 4.0 and 5.0 allows remote attackers to read file contents by requesting the file and appending a large number of encoded spaces (%20) and terminated with a .htr extension, aka the ".HTR File Fragment Reading" or "File Fragment Reading via .HTR" vulnerability.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 8, 2024, 05:21 UTC (UTC+00:00)

Security readout for executives and security teams

This is an old Microsoft IIS issue where a remote web request could expose file contents or fragments through ISM.DLL and .htr handling. If any internet-facing legacy IIS 4.0 or 5.0 system remains, treat it as sensitive-data exposure risk. Exposure is most likely on legacy Windows servers still running IIS 4.0 or 5.0 with ISM.DLL and .htr handling reachable over HTTP. Modern IIS deployments are not identified as affected in the provided sources. Prioritize if legacy IIS 4.0 or 5.0 is still reachable, especially on public or partner-facing networks. The main business concern is unauthorized disclosure of web-server file contents, potentially including configuration or application data. Mitigation focus: Review Microsoft MS00-031 and apply the vendor’s recommended remediation.; Inventory and retire any remaining IIS 4.0 or 5.0 systems.; Isolate affected legacy servers until remediation is verified..

Prepared: Jul 1, 2026, 08:03 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-2000-0457 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Mar 9, 2002, 05:00 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
MS00-031CVE reference · vendor-advisory, x_refsource_MS
iis-ism-file-access(4448)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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