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CVE-2020-3433

7.8, high Known exploited Used in ransomware

Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
7.8, high high CVSS v3.1
EPSS, next 30 days
10% higher than 95.5% of scored CVEs
Exploitation
Confirmed in the wild
Published
17 Aug 20206 years ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 24 Oct 2022 and links it to ransomware activity. US federal agencies had to remediate by 14 Nov 2022, a deadline that has passed.

Required action. Apply updates per vendor instructions.

Description

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.

Details

Vendor
Cisco
Product
Cisco AnyConnect Secure Mobility Client
Weakness
CWE-427 (opens in a new tab)
Status
Analyzed
Updated
12 Aug 2026
Assigner
psirt@cisco.com

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References 3

Exploit code 1

Advisories 1

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

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Beyond this page

Is CVE-2020-3433 in your network?

This page tells you how dangerous CVE-2020-3433 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2020-3433 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.