Buffer overflow in the login functions in IMAP server (imapd) in Ipswitch IMail 5.0 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary code via (1) a long user name or (2) a long password.
Conclusion & alert: CVE-1999-1557 is rated High Exploit Risk (73.5/100): CVSS Medium severity, with high exploitation likelihood (EPSS 23.67%, 96th percentile). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +12.04% 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 |
|---|---|---|---|---|
| 19377 | exploit_db | edb | 1999-03-01 | 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 | 2026-01-08 | 11.63% | 23.67% | +12.04% |
| 2 | 2025-04-04 | 50.80% | 11.63% | -39.17% |
| 3 | 2025-03-30 | — | 50.80% | — |
Full EPSS history (8 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |