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CVE-2007-6573

20
FAUCET Score

CVE-2007-6573 describes a denial-of-service vulnerability in QK SMTP Server 3, allowing remote attackers to crash the daemon by sending excessively long strings in HELO, MAIL FROM, RCPT TO, or DATA commands. This vulnerability has a high CVSS score of 7.8, indicating a critical impact with complete availability loss, and can be exploited remotely with low attack complexity and no authentication. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion, suggesting it is not a widely targeted threat.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:qksoft:qk_smtp_server_3:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

AV:N/AC:L/Au:N/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.61%
Probability of exploitation in next 30 days
EPSS Percentile
73.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0161 is in the 56th percentile among its peer group of 51,485 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

osvdb.org / 43533
securityreason.com / securityalert/3494
securityfocus.com / archive/1/485026/100/100/threaded