CVE-1999-1233 json
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…
published 1999-12-31 26 y ago modified 2026-06-16 4 mo ago also EUVD-1999-1214
- cvss
- 7.5
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 5.5%
- EPSS 5.5% chance of exploitation in 30 days, percentile 92%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Exploit prediction
5.45% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- securityfocus.com http://www.securityfocus.com/bid/657 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
References
-
support.microsoft.com
/support/kb/articles/Q241/5/62.asp
vendor-advisory, patch
-
securityfocus.com
/bid/657
vdb-entry, exploit, patch, vendor-advisory
-
docs.microsoft.com
/en-us/security-updates/securitybulletins/1999/ms99-039
vendor-advisory
-
exchange.xforce.ibmcloud.com
/vulnerabilities/3306
vdb-entry
Sources
- CVE List CVE-1999-1233
- NVD CVE-1999-1233
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