CVE-2004-0666

CVE-2004-0666 is a high-severity vulnerability in Popclient with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Off-by-one error in the POP3_readmsg function in popclient 3.0b6 allows remote attackers to cause a denial of service (application crash) via an e-mail message with a certain line length, which leads to a buffer overflow.

Frequently asked questions

What is CVE-2004-0666?
Off-by-one error in the POP3_readmsg function in popclient 3.0b6 allows remote attackers to cause a denial of service (application crash) via an e-mail message with a certain line length, which leads to a buffer overflow.
How severe is CVE-2004-0666?
CVE-2004-0666 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2004-0666 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-0666?
CVE-2004-0666 affects Popclient. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2004-0666?
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-2004-0666 published?
CVE-2004-0666 was published on 2004-08-06 and last updated on 2026-06-16.

References

Affected products (1)