CVE-2018-20022

What it is

LibVNC before 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838 contains multiple weaknesses CWE-665: Improper Initialization vulnerability in VNC client code that allows attacker to read stack memory and can be abuse for information disclosure. Combined with another vulnerability, it can be used to leak stack memory layout and in bypassing ASLR

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure.

Exploit odds

2.9% 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. 2018-12-19 16:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 01:52 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 2.9% in the next 30 days (EPSS).
• Severity: 7.5 HIGH (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2018-12-19 16:29 UTC

Last modified

2026-06-17 01:52 UTC

Exploit probability

2.9% · EPSS, next 30 days

Weakness

CWE-665

Record status

Modified

Affected

• Libvnc Project Libvncserver < 0.9.12
• Debian Linux 8.0
• Debian Linux 9.0
• Canonical Ubuntu Linux 14.04
• Canonical Ubuntu Linux 16.04
• Canonical Ubuntu Linux 18.04
• Canonical Ubuntu Linux 18.10

Attack profile CVSS 3.0 · 7.5

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

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-2018-20022.md and follow it. Check whether this project is affected by CVE-2018-20022. 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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