CVE-2003-1177

Exp

Buffer overflow in the base64 decoder in MERCUR Mailserver 4.2 before SP3a allows remote attackers to cause a denial of service and possibly execute arbitrary code via a long (1) AUTH command to the POP3 server or (2) AUTHENTICATE command to the IMAP server.

Published: 2003-12-31 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2003-1177 is rated High Exploit Risk (78.5/100): CVSS High severity, with high exploitation likelihood (EPSS 23.25%, 96th percentile). 5 public exploit reference(s) are indexed (Exploit-DB). 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-2003-1177

EDB-ID Source Kind Published Link
23267 exploit_db edb 2003-10-20 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2003-1177

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 2025-06-08 23.26% 23.25% -0.01%
2 2025-03-30 25.18% 23.26% -1.92%
3 2025-03-29 — 25.18% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2003-1177

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-2003-1177

Affected software / configurations for CVE-2003-1177

Vendor Product Version Raw CPE
atrium_software mercur_mailserver 3.3 cpe:2.3:a:atrium_software:mercur_mailserver:3.3:*:*:*:*:*:*:*
atrium_software mercur_mailserver 3.3_sp1 cpe:2.3:a:atrium_software:mercur_mailserver:3.3_sp1:*:*:*:*:*:*:*
atrium_software mercur_mailserver 3.3_sp2 cpe:2.3:a:atrium_software:mercur_mailserver:3.3_sp2:*:*:*:*:*:*:*
atrium_software mercur_mailserver 4.1 cpe:2.3:a:atrium_software:mercur_mailserver:4.1:*:*:*:*:*:*:*
atrium_software mercur_mailserver 4.1_sp1 cpe:2.3:a:atrium_software:mercur_mailserver:4.1_sp1:*:*:*:*:*:*:*
atrium_software mercur_mailserver 4.2 cpe:2.3:a:atrium_software:mercur_mailserver:4.2:*:*:*:*:*:*:*
atrium_software mercur_mailserver 4.2_sp1 cpe:2.3:a:atrium_software:mercur_mailserver:4.2_sp1:*:*:*:*:*:*:*
atrium_software mercur_mailserver 4.2_sp2 cpe:2.3:a:atrium_software:mercur_mailserver:4.2_sp2:*:*:*:*:*:*:*

References for CVE-2003-1177

cvelogic Threat Intelligence