CVE-2001-0375

Cisco PIX Firewall 515 and 520 - Denial of Service via TACACS+ Authentication Flood

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2001-0375. PoCs published by Claudiu Calomfirescu.

AI-analyzed exploit summary This exploit demonstrates a denial of service (DoS) attack against Cisco PIX firewalls using TACACS+ authentication. It repeatedly sends requests to exhaust firewall resources, causing a crash. The script is a simple loop using wget to trigger the vulnerability.

Description

Cisco PIX Firewall 515 and 520 with 5.1.4 OS running aaa authentication to a TACACS+ server allows remote attackers to cause a denial of service via a large number of authentication requests.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Claudiu Calomfirescu · bashdoshardware
https://www.exploit-db.com/exploits/20734

This exploit demonstrates a denial of service (DoS) attack against Cisco PIX firewalls using TACACS+ authentication. It repeatedly sends requests to exhaust firewall resources, causing a crash. The script is a simple loop using wget to trigger the vulnerability.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Cisco PIX Firewall (versions with TACACS+ authentication enabled)
No auth needed
Prerequisites: Cisco PIX Firewall with TACACS+ authentication enabled · Network access to the target firewall
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit, Patch, Vendor Advisory vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/2551
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/6353
Mailing List mailing-list x_refsource_bugtraq
http://marc.info/?l=bugtraq&m=98658271707833&w=2
Vendor Advisory vendor-advisory x_refsource_cisco
http://www.cisco.com/warp/public/707/pixfirewall-authen-flood-pub.shtml

Scores

EPSS 0.1030
EPSS Percentile 95.1%

Details

Status published
Products (2)
cisco/pix_firewall_515
cisco/pix_firewall_520
Published Jun 18, 2001
Tracked Since Feb 18, 2026