CVE-2004-0380
The MHTML protocol handler in Microsoft Outlook Express 5.5 SP2 through Outlook Express 6 SP1 allows remote attackers to bypass domain…
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
The MHTML protocol handler in Microsoft Outlook Express 5.5 SP2 through Outlook Express 6 SP1 allows remote attackers to bypass domain restrictions and execute arbitrary code, as demonstrated on Internet Explorer using script in a compiled help (CHM) file that references the InfoTech Storage (ITS) protocol handlers such as (1) ms-its, (2) ms-itss, (3) its, or (4) mk:@MSITStore, aka the "MHTML URL Processing Vulnerability."
Timeline
ID reserved
By mitre
- 1 day later
· 1 day later
Published
- 20 years later
· 20 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 | High10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
- EPSS (exploitation in 30 days)
- 63.2% · top 0.8% of all CVEs (9 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 10.0.
Weakness
- n/a
Affected products
n/a
- affected n/a
References (14)
- oval:org.mitre.oval:def:990 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- 9105 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- VU#323070 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
- oval:org.mitre.oval:def:1010 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- outlook-mhtml-execute-code(15705) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- MS04-013 (opens in a new tab)vendor-advisoryx_refsource_MSx_transferred
- 9658 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- TA04-104A (opens in a new tab)third-party-advisoryx_refsource_CERTx_transferred
- oval:org.mitre.oval:def:882 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- http://www.k-otik.net/bugtraq/02.18.InternetExplorer.php (opens in a new tab)x_refsource_MISCx_transferred
- 20040328 IE ms-its: and mk:@MSITStore: vulnerability (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20040219 Microsoft Internet Explorer Unspecified CHM File Processing Arbitrary Code Execution Vulnerability (bid 9658) (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- oval:org.mitre.oval:def:1028 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- 10523 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_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-2004-0380)Record last updated .