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.
Conclusion & alert: CVE-1999-1521 is rated High Exploit Risk (93.4/100): CVSS Critical severity, with high exploitation likelihood (EPSS 20.78%, 96th percentile). Core evidence: 2 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +14.25% over the last day, indicating growing attacker interest. Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| 19495 | exploit_db | edb | 1999-09-13 | Exploit-DB ↗ |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-03-14 | 6.54% | 20.78% | +14.25% |
| 2 | 2025-07-02 | 5.50% | 6.54% | +1.03% |
| 3 | 2025-03-30 | — | 5.50% | — |
Full EPSS history (9 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 10.0 | 2.0 | HIGH |
|
10.0 | 10.0 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| computalynx | cmail | 2.3sp2 | cpe:2.3:a:computalynx:cmail:2.3sp2:*:*:*:*:*:*:* |
| computalynx | cmail | 2.4 | cpe:2.3:a:computalynx:cmail:2.4:*:*:*:*:*:*:* |