CVE-2003-0487

Exp

Multiple buffer overflows in Kerio MailServer 5.6.3 allow remote authenticated users to cause a denial of service and possibly execute arbitrary code via (1) a long showuser parameter in the do_subscribe module, (2) a long folder parameter in the add_acl module, (3) a long folder parameter in the list module, and (4) a long user parameter in the do_map module.

Published: 2003-08-07 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2003-0487 is rated High Exploit Risk (83.4/100): CVSS High severity, with high exploitation likelihood (EPSS 20.79%, 95th percentile). 7 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +11.00% over the last day, indicating growing attacker interest. 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.

Public exploit references (Exploit-DB) for CVE-2003-0487

EDB-ID Source Kind Published Link
46 exploit_db edb 2003-06-27 Exploit-DB ↗
22800 exploit_db edb 2003-06-18 Exploit-DB ↗
22802 exploit_db edb 2003-06-18 Exploit-DB ↗
22803 exploit_db edb 2003-06-18 Exploit-DB ↗
22801 exploit_db edb 2003-06-18 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2003-0487

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 2025-11-15 9.79% 20.79% +11.00%
2 2025-03-30 11.05% 9.79% -1.26%
3 2025-03-29 — 11.05% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2003-0487

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2003-0487

Affected software / configurations for CVE-2003-0487

Vendor Product Version Raw CPE
kerio kerio_mailserver 5.6.3 cpe:2.3:a:kerio:kerio_mailserver:5.6.3:*:*:*:*:*:*:*

References for CVE-2003-0487

cvelogic Threat Intelligence