CVE-1999-1521

CVE-1999-1521 is a critical-severity vulnerability in Computalynx Cmail with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Computalynx CMail 2.4 and CMail 2.3 SP2 SMTP servers are vulnerable to a buffer overflow attack in the MAIL FROM command that may allow a remote attacker to execute arbitrary code on the server.

Frequently asked questions

What is CVE-1999-1521?
Computalynx CMail 2.4 and CMail 2.3 SP2 SMTP servers are vulnerable to a buffer overflow attack in the MAIL FROM command that may allow a remote attacker to execute arbitrary code on the server.
How severe is CVE-1999-1521?
CVE-1999-1521 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-1999-1521 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-1521?
CVE-1999-1521 primarily affects Computalynx Cmail. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-1521?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-1999-1521 published?
CVE-1999-1521 was published on 1999-09-12 and last updated on 2026-06-16.

References

Affected products (2)

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