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CVE-2001-0664
Internet Explorer 5.5 and 5.01 allows remote attackers to bypass security restrictions via malformed URLs that contain dotless IP…
High7.5EPSS 18.2%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
Internet Explorer 5.5 and 5.01 allows remote attackers to bypass security restrictions via malformed URLs that contain dotless IP addresses, which causes Internet Explorer to process the page in the Intranet Zone, which may have fewer security restrictions, aka the "Zone Spoofing vulnerability."
Timeline
ID reserved
By mitre
- 7 months later
· 7 months later
Published
- 22 years later
· 22 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 18.2% · top 2.8% of all CVEs (8 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
- n/a
Affected products
n/a
- affected n/a
References (6)
- http://morph3us.org/blog/?p=31 (opens in a new tab)x_refsource_MISCx_transferred
- 20011011 Serious security Flaw in Microsoft Internet Explorer - Zone Spoofing (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 1971 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- ie-incorrect-security-zone(7258) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- MS01-051 (opens in a new tab)vendor-advisoryx_refsource_MSx_transferred
- 3420 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2001-0664)Record last updated .