CVE-2007-6573 — QK SMTP Server 3 allows remote attackers to cause a denial of service (daemon crash) via a long (1) HELO, (2) MAIL FROM, or (3) RCPT TO command; or (4) a long string in the message sent after the DATA command; possibly a related issue to CVE-2006-5551

Back Back to CVE browser

HIGH

QK SMTP Server 3 allows remote attackers to cause a denial of service (daemon crash) via a long (1) HELO, (2) MAIL FROM, or (3) RCPT TO command; or (4) a long string in the message sent after the DATA command; possibly a related issue to CVE-2006-5551

Published Dec 28, 2007

7.8

HIGH

CVSS 2.0

EPSS 1.61%

Description

QK SMTP Server 3 allows remote attackers to cause a denial of service (daemon crash) via a long (1) HELO, (2) MAIL FROM, or (3) RCPT TO command; or (4) a long string in the message sent after the DATA command; possibly a related issue to CVE-2006-5551.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.61% 0.01612

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01612

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (12 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.61% (0.01612)	75.07th	v5 (v2026.06.15)
Jun 15, 2026	1.61% (0.01612)	72.73th	v5 (v2026.06.15)
Mar 17, 2025	0.62% (0.00616)	68.12th	v4 (v2025.03.14)
Dec 12, 2024	1.40% (0.01403)	86.98th	v3 (v2023.03.01)
Jul 9, 2024	1.11% (0.01114)	84.64th	v3 (v2023.03.01)
May 31, 2024	1.07% (0.01069)	84.22th	v3 (v2023.03.01)
Mar 19, 2024	0.94% (0.00943)	82.73th	v3 (v2023.03.01)
Mar 7, 2023	0.94% (0.00943)	80.73th	v3 (v2023.03.01)
Mar 6, 2023	1.14% (0.01136)	59.45th	v2 (v2022.01.01)
Oct 18, 2022	1.14% (0.01136)	58.28th	v2 (v2022.01.01)
Apr 1, 2022	1.14% (0.01136)	56.27th	v2 (v2022.01.01)
Feb 4, 2022	1.14% (0.01136)	34.23th	v2 (v2022.01.01)

Weaknesses (1)

CWE-20

Improper Input Validation

References (3)

http://osvdb.org/43533
vdb-entryx_refsource_OSVDB
http://securityreason.com/securityalert/3494
third-party-advisoryx_refsource_SREASON
http://www.securityfocus.com/archive/1/485026/100/100/threaded
mailing-listx_refsource_BUGTRAQ

Link	Providers	Tags
http://osvdb.org/43533		vdb-entryx_refsource_OSVDB
http://securityreason.com/securityalert/3494		third-party-advisoryx_refsource_SREASON
http://www.securityfocus.com/archive/1/485026/100/100/threaded		mailing-listx_refsource_BUGTRAQ

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Dec 28, 2007

Updated Aug 7, 2024

Reserved Dec 28, 2007

Link CVE-2007-6573

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2007-6573

Red Hat

Severity n/a

Public date n/a

Links CVE-2007-6573