CVE-2011-0355

What it is

Cisco Nexus 1000V Virtual Ethernet Module (VEM) 4.0(4) SV1(1) through SV1(3b), as used in VMware ESX 4.0 and 4.1 and ESXi 4.0 and 4.1, does not properly handle dropped packets, which allows guest OS users to cause a denial of service (ESX or ESXi host OS crash) by sending an 802.1Q tagged packet over an access vEthernet port, aka Cisco Bug ID CSCtj17451.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

2.0% chance of exploitation in the next 30 days (EPSS).

Fix

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

Timeline

1. 2011-02-17 18:00 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:27 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 2.0% in the next 30 days (EPSS).
• Severity: 7.8 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2011-02-17 18:00 UTC

Last modified

2026-06-16 23:27 UTC

Exploit probability

2.0% · EPSS, next 30 days

Weakness

CWE-399

Record status

Modified

Affected

• Cisco 1000v Virtual Ethernet Module \(vem\) 4.0\(4\)
• VMware Esx 4.0
• VMware Esx 4.1
• VMware Esxi 4.0
• VMware Esxi 4.1

Attack profile CVSS 2.0 · 7.8

Attack vector

Network

Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

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-2011-0355.md and follow it. Check whether this project is affected by CVE-2011-0355. 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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