CVE-2009-4118

What it is

The StartServiceCtrlDispatcher function in the cvpnd service (cvpnd.exe) in Cisco VPN client for Windows before 5.0.06.0100 does not properly handle an ERROR_FAILED_SERVICE_CONTROLLER_CONNECT error, which allows local users to cause a denial of service (service crash and VPN connection loss) via a manual start of cvpnd.exe while the cvpnd service is running.

At a glance

Exploitability

Can be exploited locally on the machine without logging in. Limited direct impact.

Exploit odds

2.5% chance of exploitation in the next 30 days (EPSS).

Fix

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

Timeline

1. 2009-12-01 00:30 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: 2.5% in the next 30 days (EPSS).
• Severity: 2.1 LOW (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2009-12-01 00:30 UTC

Last modified

2026-06-16 23:13 UTC

Exploit probability

2.5% · EPSS, next 30 days

Record status

Modified

Affected

• Cisco Vpn Client 2.0
• Cisco Vpn Client 3.0
• Cisco Vpn Client 3.0.5
• Cisco Vpn Client 3.1
• Cisco Vpn Client 3.5.1
• Cisco Vpn Client 3.5.1c
• Cisco Vpn Client 3.5.2
• Cisco Vpn Client 3.6.5

Attack profile CVSS 2.0 · 2.1

Attack vector

Local

Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

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-2009-4118.md and follow it. Check whether this project is affected by CVE-2009-4118. 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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