Buffer overflow in Internet Mail Connector (IMC) for Microsoft Exchange Server 5.5 allows…
Priority MEDIUM 52CWE-120Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.
Summary
Buffer overflow in Internet Mail Connector (IMC) for Microsoft Exchange Server 5.5 allows remote attackers to execute arbitrary code via an EHLO request from a system with a long name as obtained through a reverse DNS lookup, which triggers the overflow in IMC's hello response.
Why it matters now
EPSS 0.20257 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 · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microsoft:exchange_server:5.5:-:*:*:*:*:*:* | 5.5 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:exchange_server:5.5:sp1:*:*:*:*:*:* | 5.5 sp1 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:exchange_server:5.5:sp2:*:*:*:*:*:* | 5.5 sp2 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:exchange_server:5.5:sp3:*:*:*:*:*:* | 5.5 sp3 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:exchange_server:5.5:sp4:*:*:*:*:*:* | 5.5 sp4 | Vulnerable | Microsoft |
- cpe:2.3:a:microsoft:exchange_server:5.5:-:*:*:*:*:*:* Versions 5.5 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:exchange_server:5.5:sp1:*:*:*:*:*:* Versions 5.5 sp1 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:exchange_server:5.5:sp2:*:*:*:*:*:* Versions 5.5 sp2 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:exchange_server:5.5:sp3:*:*:*:*:*:* Versions 5.5 sp3 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:exchange_server:5.5:sp4:*:*:*:*:*:* Versions 5.5 sp4 Vulnerable ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2002-0698
- 2026-10-03 Alias added: GHSA-mw2r-jm5q-xp3p
References
More Microsoft Exchange Server vulnerabilities
- TI-2024-14170 Microsoft Exchange Server Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2022-19610 Microsoft Exchange Server Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2021-13547 Microsoft Exchange Server Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2021-13502 Microsoft Exchange Server Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2021-08465 Microsoft Exchange Server Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2023-07929 Microsoft Exchange Server Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 8.8
Sources
- CVE-2002-0698 · CVE Program
- CVE-2002-0698 · NVD
- FIRST EPSS
- GHSA-mw2r-jm5q-xp3p · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences