The IMAP server in IMail Server 8.20 in Ipswitch Collaboration Suite (ICS) before 2.02 allows remote attackers to cause a denial of service (crash) via a long argument to the LIST command, which causes IMail Server to reference invalid memory.
Conclusion & alert: CVE-2005-2923 is rated Moderate Risk (47.9/100): CVSS Medium severity, with high exploitation likelihood (EPSS 5.62%, 90th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
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 | 2026-01-05 | 5.25% | 5.62% | +0.37% |
| 2 | 2025-09-04 | 5.89% | 5.25% | -0.64% |
| 3 | 2025-06-21 | — | 5.89% | — |
Full EPSS history (14 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.0 | 2.0 | MEDIUM |
|
8.0 | 2.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| ipswitch | imail_server | 8.20 | cpe:2.3:a:ipswitch:imail_server:8.20:*:*:*:*:*:*:* |
| ipswitch | ipswitch_collaboration_suite | 2.0 | cpe:2.3:a:ipswitch:ipswitch_collaboration_suite:2.0:*:*:*:*:*:*:* |
| ipswitch | ipswitch_collaboration_suite | 2.01 | cpe:2.3:a:ipswitch:ipswitch_collaboration_suite:2.01:*:*:*:*:*:*:* |