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CVE-1999-1233
IIS 4.0 does not properly restrict access for the initial session request from a user's IP address if the address does not resolve to a…
High7.5EPSS 5.5%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
IIS 4.0 does not properly restrict access for the initial session request from a user's IP address if the address does not resolve to a DNS domain, aka the "Domain Resolution" vulnerability.
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)
- 5.5% · top 7.2% of all CVEs (6 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 (4)
- iis-unresolved-domain-access(3306) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 241562 (opens in a new tab)vendor-advisoryx_refsource_MSKBx_transferred
- 657 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- MS99-039 (opens in a new tab)vendor-advisoryx_refsource_MSx_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://trackcve.app/cve/CVE-1999-1233)Record last updated .