CVE-2009-4455

What it is

The default configuration of Cisco ASA 5500 Series Adaptive Security Appliance (Cisco ASA) 7.0, 7.1, 7.2, 8.0, 8.1, and 8.2 allows portal traffic to access arbitrary backend servers, which might allow remote authenticated users to bypass intended access restrictions and access unauthorized web sites via a crafted URL obfuscated with ROT13 and a certain encoding. NOTE: this issue was originally reported as a vulnerability related to lack of restrictions to URLs listed in the Cisco WebVPN bookmark component, but the vendor states that "The bookmark feature is not a security feature."

At a glance

Exploitability

Can be exploited over the network with a login. Limited direct impact.

Exploit odds

1.3% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2009-12-29 23:30 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:13 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.3% in the next 30 days (EPSS).
• Severity: 6.5 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2009-12-29 23:30 UTC

Last modified

2026-06-16 23:13 UTC

Exploit probability

1.3% · EPSS, next 30 days

Weakness

CWE-264

Record status

Modified

Affected

• Cisco Adaptive Security Appliance 5500 7.0
• Cisco Adaptive Security Appliance 5500 7.1
• Cisco Adaptive Security Appliance 5500 7.2
• Cisco Adaptive Security Appliance 5500 8.0
• Cisco Adaptive Security Appliance 5500 8.1
• Cisco Adaptive Security Appliance 5500 8.2

Attack profile CVSS 2.0 · 6.5

Attack vector

Network

Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

Partial

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-2009-4455.md and follow it. Check whether this project is affected by CVE-2009-4455. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

Copy as ticket · More options · Status badge