Microsoft Outlook 98 and 2000, and Outlook Express 4.0x and 5.0x, allow remote attackers…
Priority MEDIUM 53Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Microsoft Outlook 98 and 2000, and Outlook Express 4.0x and 5.0x, allow remote attackers to read files on the client's system via a malformed HTML message that stores files outside of the cache, aka the "Cache Bypass" vulnerability.
Why it matters now
EPSS 0.22143 97th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microsoft:outlook:97:*:*:*:*:*:*:* | 97 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:outlook:98:*:*:*:*:*:*:* | 98 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:outlook:2000:*:*:*:*:*:*:* | 2000 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:outlook_express:4.0:*:*:*:*:*:*:* | 4.0 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:outlook_express:4.01:*:*:*:*:*:*:* | 4.01 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:outlook_express:5.0:*:*:*:*:*:*:* | 5.0 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:outlook_express:5.0.1:*:*:*:*:*:*:* | 5.0.1 | Vulnerable | Microsoft |
- cpe:2.3:a:microsoft:outlook:97:*:*:*:*:*:*:* Versions 97 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:outlook:98:*:*:*:*:*:*:* Versions 98 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:outlook:2000:*:*:*:*:*:*:* Versions 2000 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:outlook_express:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:outlook_express:4.01:*:*:*:*:*:*:* Versions 4.01 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:outlook_express:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:outlook_express:5.0.1:*:*:*:*:*:*:* Versions 5.0.1 Vulnerable ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2000-0621
- 2026-10-03 Alias added: GHSA-vvh2-vwv7-8grx
References
Patch 1
Advisory 1
More Microsoft Outlook vulnerabilities
- TI-2023-09240 Microsoft Outlook Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2023-17652 Microsoft Outlook Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2007-00655 Unspecified vulnerability in Microsoft Excel 2000, XP, 2003, and 2004 for Mac, and… KEVCVSS 3.1HIGH 8.8
- TI-2017-08726 Memory corruption in Microsoft Outlook KEVCVSS 3.1HIGH 7.8
- TI-2015-01471 Microsoft Word 2007 SP3, Office 2010 SP2, Word 2010 SP2, Word 2013 SP1, Word 2013 RT SP1… KEVCVSS 3.1HIGH 7.8
- TI-2006-04695 Stack-based buffer overflow in the Vector Graphics Rendering engine (vgx.dll), as used in… CVSS 2.0HIGH 9.3
Sources
- CVE-2000-0621 · CVE Program
- CVE-2000-0621 · NVD
- FIRST EPSS
- GHSA-vvh2-vwv7-8grx · GitHub Advisory Database · CC BY 4.0
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