CVE-1999-1553

XCmail 0.99.6 - Remote Code Execution via Long Subject Line

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-1999-1553. PoCs published by Arthur.

AI-analyzed exploit summary This exploit targets a buffer overflow in XCmail when replying to a message with a long subject line and autoquote enabled. It uses a small buffer and precise return address calculation to execute shellcode, providing a remote shell.

Description

Buffer overflow in XCmail 0.99.6 with autoquote enabled allows remote attackers to execute arbitrary commands via a long subject line.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Arthur · clocallinux
https://www.exploit-db.com/exploits/19249

This exploit targets a buffer overflow in XCmail when replying to a message with a long subject line and autoquote enabled. It uses a small buffer and precise return address calculation to execute shellcode, providing a remote shell.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Racy
Target: XCmail (version not specified)
No auth needed
Prerequisites: Autoquote enabled in XCmail · Knowledge of target's ESP value
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/311
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/1859
Exploit mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/12730

Scores

EPSS 0.0598
EPSS Percentile 92.4%

Details

Status published
Products (1)
xcmail/xcmail 0.99.6
Published May 01, 1999
Tracked Since Feb 18, 2026