CVE-2006-4194

What it is

Unspecified vulnerability in Cisco PIX 500 Series Security Appliances allows remote attackers to send arbitrary UDP packets to intranet devices via unspecified vectors involving Session Initiation Protocol (SIP) fixup commands, a different issue than CVE-2006-4032. NOTE: the vendor, after working with the researcher, has been unable to reproduce the issue

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

2.3% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2006-08-17 01:04 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 22:28 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 2.3% in the next 30 days (EPSS).
• Severity: 5.0 MEDIUM (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2006-08-17 01:04 UTC

Last modified

2026-06-16 22:28 UTC

Exploit probability

2.3% · EPSS, next 30 days

Record status

Modified

Affected

• Cisco Pix Firewall 501
• Cisco Pix Firewall 506
• Cisco Pix Firewall 515
• Cisco Pix Firewall 515e
• Cisco Pix Firewall 520
• Cisco Pix Firewall 525
• Cisco Pix Firewall 535
• Cisco Pix Firewall Software 6.3

Attack profile CVSS 2.0 · 5.0

Attack vector

Network

Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2006-4194.md and follow it. Check whether this project is affected by CVE-2006-4194. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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