CVE-2006-1966

CVE-2006-1966 is a medium-severity vulnerability in Fortinet Fortinet28 with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

An unspecified Fortinet product, possibly Fortinet28, allows remote attackers to cause a denial of service via a "small synflood" to the SMTP port (TCP port 25), as demonstrated by a 10-microsecond wait between sending packets. NOTE: this issue has been disputed in followup posts that suggest that a protection feature is triggering a RST.

Frequently asked questions

What is CVE-2006-1966?
An unspecified Fortinet product, possibly Fortinet28, allows remote attackers to cause a denial of service via a "small synflood" to the SMTP port (TCP port 25), as demonstrated by a 10-microsecond wait between sending packets. NOTE: this issue has been disputed in followup posts that suggest that a protection feature is triggering a RST.
How severe is CVE-2006-1966?
CVE-2006-1966 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2006-1966 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-1966?
CVE-2006-1966 affects Fortinet Fortinet28. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2006-1966?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-1966 published?
CVE-2006-1966 was published on 2006-04-21 and last updated on 2026-06-16.

References

Affected products (1)