CVE-2006-2659

CVE-2006-2659 is a high-severity vulnerability in Double Precision Incorporated Courier Mta with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

libs/comverp.c in Courier MTA before 0.53.2 allows attackers to cause a denial of service (CPU consumption) via unknown vectors involving usernames that contain the "=" (equals) character, which is not properly handled during encoding.

Frequently asked questions

What is CVE-2006-2659?
libs/comverp.c in Courier MTA before 0.53.2 allows attackers to cause a denial of service (CPU consumption) via unknown vectors involving usernames that contain the "=" (equals) character, which is not properly handled during encoding.
How severe is CVE-2006-2659?
CVE-2006-2659 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2006-2659 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-2659?
CVE-2006-2659 primarily affects Double Precision Incorporated Courier Mta. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-2659?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2006-2659 published?
CVE-2006-2659 was published on 2006-05-30 and last updated on 2026-06-16.

References

Affected products (8)

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