CVE-2020-3433

What it is

A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to perform a DLL hijacking attack. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system. The vulnerability is due to insufficient validation of resources that are loaded by the application at run time. An attacker could exploit this vulnerability by sending a crafted IPC message to the AnyConnect process. A successful exploit could allow the attacker to execute arbitrary code on the affected machine with SYSTEM privileges. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system.

At a glance

Exploitability

Can be exploited locally on the machine with a low-privilege account. High risk of data exposure, data tampering, service disruption.

In the wild

CISA lists this as exploited in real attacks. Treat as urgent.

Fix

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

Timeline

1. 2019-12-12 00:00 UTC ReservedThe CVE id was reserved by its CNA
2. 2020-08-17 18:15 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2022-10-24 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
4. 2022-11-14 Remediation deadlineCISA's due date for federal agencies to fix it
5. 2026-08-12 05:17 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
• Exploit odds: 10.0% in the next 30 days (EPSS).
• Severity: 7.8 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2020-08-17 18:15 UTC

Last modified

2026-08-12 05:17 UTC

Added to CISA KEV

2022-10-24

Exploit probability

10.0% · EPSS, next 30 days

Weakness

CWE-427

Record status

Analyzed

Affected

• Cisco Anyconnect Secure Mobility Client < 4.9.00086

Attack profile CVSS 3.1 · 7.8

Attack vector

Local

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

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-2020-3433.md and follow it. Check whether this project is affected by CVE-2020-3433. 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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