CVE-2006-5551
Stack-based buffer overflow in QK SMTP 3.01 and earlier might allow remote attackers to execute...
Stack-based buffer overflow in QK SMTP 3.01 and earlier might allow remote attackers to execute arbitrary code via a long argument to the RCPT TO command.
Exploit likelihood
What each source reports
NVD Score used
Stack-based buffer overflow in QK SMTP 3.01 and earlier might allow remote attackers to execute arbitrary code via a long argument to the RCPT TO command.
- Record
CVE-2006-5551- CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Updated
- 2026-11-02
CVE List No score
Stack-based buffer overflow in QK SMTP 3.01 and earlier might allow remote attackers to execute arbitrary code via a long argument to the RCPT TO command.
- Record
CVE-2006-5551- Updated
- 2026-11-02
EUVDEUVD-2006-5536 No score
Stack-based buffer overflow in QK SMTP 3.01 and earlier might allow remote attackers to execute arbitrary code via a long argument to the RCPT TO command.
- Record
EUVD-2006-5536- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-j7m7-hxw4-gvrp No score
Stack-based buffer overflow in QK SMTP 3.01 and earlier might allow remote attackers to execute...
Stack-based buffer overflow in QK SMTP 3.01 and earlier might allow remote attackers to execute arbitrary code via a long argument to the RCPT TO command.
- Record
GHSA-j7m7-hxw4-gvrp- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | QK SMTP 3.01 - 'RCPT TO' Remote Denial of Service | 2006-10-23 |
| Exploit-DB | QK SMTP 3.01 - 'RCPT TO' Remote Buffer Overflow (1) | 2006-10-25 |
| Exploit-DB | QK SMTP 3.01 - 'RCPT TO' Remote Buffer Overflow (2) | 2007-01-01 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2006-5551 is a high vulnerability (CVSS 7.5) in Qksoft Qk Smtp, published October 26, 2006. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 5.19%, the 92nd percentile. No source names a fixed version.