CVE-2000-1022

Cisco Secure PIX Firewall <5.2(2) - Command Injection

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2000-1022. PoCs published by Lincoln Yeoh.

AI-analyzed exploit summary The exploit describes a flaw in Cisco PIX Firewall's SMTP filtering mechanism where sending the 'data' command prematurely can bypass command restrictions, allowing unauthorized SMTP commands to be executed on the email server.

Description

The mailguard feature in Cisco Secure PIX Firewall 5.2(2) and earlier does not properly restrict access to SMTP commands, which allows remote attackers to execute restricted commands by sending a DATA command before sending the restricted commands.

Exploits (1)

exploitdb WRITEUP VERIFIED
by Lincoln Yeoh · textremotehardware
https://www.exploit-db.com/exploits/20231

The exploit describes a flaw in Cisco PIX Firewall's SMTP filtering mechanism where sending the 'data' command prematurely can bypass command restrictions, allowing unauthorized SMTP commands to be executed on the email server.

Classification
Writeup 90%
Attack Type
Auth Bypass
Complexity
Trivial
Reliability
Theoretical
Target: Cisco PIX Firewall (versions affected by CVE-2000-1022)
No auth needed
Prerequisites: Access to an SMTP server behind a vulnerable Cisco PIX Firewall
mistral-large-3 · analyzed Feb 16, 2026 Full analysis →

References (5)

Core 5
Core References
Exploit, Patch, Vendor Advisory vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/1698
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/5277
Vendor Advisory vendor-advisory x_refsource_cisco
http://www.cisco.com/warp/public/707/PIXfirewallSMTPfilter-pub.shtml
Third Party Advisory mailing-list x_refsource_bugtraq
http://archives.neohapsis.com/archives/bugtraq/2000-09/0241.html
Third Party Advisory mailing-list x_refsource_bugtraq
http://archives.neohapsis.com/archives/bugtraq/2000-09/0222.html

Scores

EPSS 0.0710
EPSS Percentile 93.5%

Details

Status published
Products (8)
cisco/pix_firewall_software 4.2\(1\)
cisco/pix_firewall_software 4.2\(2\)
cisco/pix_firewall_software 4.2\(5\)
cisco/pix_firewall_software 4.3
cisco/pix_firewall_software 4.4\(4\)
cisco/pix_firewall_software 5.0
cisco/pix_firewall_software 5.1
cisco/pix_firewall_software 5.2
Published Dec 11, 2000
Tracked Since Feb 18, 2026