Microsoft Outlook 8.5 and earlier, and Outlook Express 5 and earlier, with the…
Priority MEDIUM 51Published · 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 8.5 and earlier, and Outlook Express 5 and earlier, with the "Automatically put people I reply to in my address book" option enabled, do not notify the user when the "Reply-To" address is different than the "From" address, which could allow an untrusted remote attacker to spoof legitimate addresses and intercept email from the client that is intended for another user.
Why it matters now
EPSS 0.19711 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 · 11
| 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:4.5:*:*:*:*:*:*:* | 4.5 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:outlook_express:4.27.3110:*:*:*:*:*:*:* | 4.27.3110 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:outlook_express:4.72.2106:*:*:*:*:*:*:* | 4.72.2106 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:outlook_express:4.72.3120.0:*:*:*:*:*:*:* | 4.72.3120.0 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:outlook_express:4.72.3612:*:*:*:*:*:*:* | 4.72.3612 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:outlook_express:5.0:*:*:*:*:*:*:* | 5.0 | 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:4.5:*:*:*:*:*:*:* Versions 4.5 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:outlook_express:4.27.3110:*:*:*:*:*:*:* Versions 4.27.3110 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:outlook_express:4.72.2106:*:*:*:*:*:*:* Versions 4.72.2106 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:outlook_express:4.72.3120.0:*:*:*:*:*:*:* Versions 4.72.3120.0 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:outlook_express:4.72.3612:*:*:*:*:*:*:* Versions 4.72.3612 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:outlook_express:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2001-1088
- 2026-10-03 Alias added: GHSA-3gjx-5wwv-5mvf
References
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-2001-1088 · CVE Program
- CVE-2001-1088 · NVD
- FIRST EPSS
- GHSA-3gjx-5wwv-5mvf · GitHub Advisory Database · CC BY 4.0
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