# CVE-2003-1177

## Summary

- **CVE ID:** CVE-2003-1177
- **Severity:** UNKNOWN
- **CVSS Score:** 0.93
- **CWE:** N/A
- **Published:** May 10, 2005
- **Last Modified:** Mar 16, 2026

## Description

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.

## Affected Products

- n/a — n/a (n/a)

## References

- [CNA](http://www.securityfocus.com/bid/8861)
- [CNA](http://secunia.com/advisories/10038)
- [CNA](http://www.securityfocus.com/bid/8889)
- [CNA](http://www.osvdb.org/2688)
- [CNA](http://archives.neohapsis.com/archives/fulldisclosure/2003-q4/1459.html)
- [CNA](https://exchange.xforce.ibmcloud.com/vulnerabilities/13468)
- [CNA](http://www.atrium-software.com/mail%20server/pub/mcr42sp3a.html)
- [CNA](http://www.securiteam.com/windowsntfocus/6U00N1P8KC.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 23.25%
- **EPSS Percentile:** 95.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._